NDA 019516/S-034
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MS CONTIN
®
(morphine sulfate controlled-release) Tablets
CII
15 mg 30 mg 60 mg 100 mg* 200 mg*
*100 mg and 200 mg are for use in opioid-tolerant patients only
WARNING:
MS CONTIN contains morphine sulfate, an opioid agonist and a Schedule II controlled
substance, with an abuse liability similar to other opioid analgesics.
Morphine can be abused in a manner similar to other opioid agonists, legal or illicit. This
should be considered when prescribing or dispensing MS CONTIN in situations where the
physician or pharmacist is concerned about an increased risk of misuse, abuse, or
diversion.
MS CONTIN Tablets are a controlled-release oral formulation of morphine sulfate
indicated for the management of moderate to severe pain when a continuous, around-the-
clock opioid analgesic is needed for an extended period of time.
MS CONTIN Tablets are NOT intended for use as a prn analgesic.
MS CONTIN 100 and 200 mg Tablets ARE FOR USE IN OPIOID-TOLERANT
PATIENTS ONLY. These tablet strengths may cause fatal respiratory depression when
administered to patients not previously exposed to opioids.
MS CONTIN TABLETS ARE TO BE SWALLOWED WHOLE AND ARE NOT TO BE
BROKEN, CHEWED, DISSOLVED, OR CRUSHED. TAKING BROKEN, CHEWED,
DISSOLVED, OR CRUSHED MS CONTIN TABLETS LEADS TO RAPID RELEASE
AND ABSORPTION OF A POTENTIALLY FATAL DOSE OF MORPHINE.
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 4
DESCRIPTION
Chemically, morphine sulfate is 7,8-didehydro-4,5α-epoxy-17-methylmorphinan-3,6α-diol
sulfate (2:1) (salt) pentahydrate and has the following structural formula:
MS CONTIN
®
(morphine sulfate controlled-release) Tablets are opiate analgesics supplied in 15,
30, 60, 100 and 200 mg tablet strengths. The tablet strengths describe the amount of morphine
per tablet as the pentahydrated sulfate salt (morphine sulfate, USP). MS CONTIN
®
Controlled-
release Tablets 15 mg, 30 mg, 60 mg, 100 mg, and 200 mg contain the following inactive
ingredients: cetostearyl alcohol, hydroxyethyl cellulose, hypromellose, magnesium stearate,
polyethylene glycol, talc and titanium dioxide.
MS CONTIN Controlled-release Tablets 15 mg also contains FD&C Blue No. 2, lactose and
polysorbate 80.
MS CONTIN Controlled-release Tablets 30 mg also contains D&C Red No. 7, FD&C Blue No.
1, lactose and polysorbate 80.
MS CONTIN Controlled-release Tablets 60 mg also contains D&C Red No. 30, D&C Yellow
No. 10, hydroxypropyl cellulose, and lactose.
MS CONTIN Controlled-release Tablets 100 mg also contains black iron oxide.
MS CONTIN Controlled-release Tablets 200 mg also contains D&C Yellow No. 10, FD&C Blue
No. 1, and hydroxypropyl cellulose.
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 5
CLINICAL PHARMACOLOGY
Morphine is a pure opioid agonist whose principal therapeutic action is analgesia. Other
members of the class known as opioid agonists include substances such as oxycodone,
hydromorphone, fentanyl, codeine, and hydrocodone. Pharmacological effects of opioid agonists
include anxiolysis, euphoria, feelings of relaxation, respiratory depression, constipation, miosis,
cough suppression, and analgesia. Like all pure opioid agonist analgesics, with increasing doses
there is increasing analgesia, unlike with mixed agonist/antagonists or non-opioid analgesics,
where there is a limit to the analgesic effect with increasing doses. With pure opioid agonist
analgesics, there is no defined maximum dose; the ceiling to analgesic effectiveness is imposed
only by side effects, the more serious which may include somnolence and respiratory depression.
Central Nervous System
The principal actions of therapeutic value of morphine are analgesia and sedation (i.e., sleepiness
and anxiolysis).
The precise mechanism of the analgesic action is unknown. However, specific CNS opiate
receptors for endogenous compounds with opioid-like activity have been identified throughout
the brain and spinal cord and are likely to play a role in the expression of analgesic effects.
Morphine produces respiratory depression by direct action on brainstem respiratory centers. The
mechanism of respiratory depression involves a reduction in the responsiveness of the brainstem
respiratory centers to increases in carbon dioxide tension, and to electrical stimulation.
Morphine depresses the cough reflex by direct effect on the cough center in the medulla.
Antitussive effects may occur with doses lower than those usually required for analgesia.
Morphine causes miosis, even in total darkness. Pinpoint pupils are a sign of narcotic overdose
but are not pathognomonic (e.g., pontine lesions of hemorrhagic or ischemic origins may
produce similar findings). Marked mydriasis rather than miosis may be seen with worsening
hypoxia.
Gastrointestinal Tract and Other Smooth Muscle
Morphine causes a reduction in motility associated with an increase in smooth muscle tone in the
antrum of the stomach and in the duodenum. Digestion of food is delayed in the small intestine
and propulsive contractions are decreased. Propulsive peristaltic waves in the colon are
decreased, while tone may be increased to the point of spasm resulting in constipation. Other
opioid induced-effects may include a reduction in gastric, biliary and pancreatic secretions,
spasm of the sphincter of Oddi, and transient elevations in serum amylase.
Cardiovascular System
Morphine produces peripheral vasodilation which may result in orthostatic hypotension. Release
of histamine can occur and may contribute to opioid-induced hypotension. Manifestations of
histamine release and/or peripheral vasodilation may include pruritus, flushing, red eyes, and
sweating.
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NDA 019516/S-034
Page 6
Endocrine System
Opioids have been shown to have a variety of effects on the secretion of hormones. Opioids
inhibit the secretion of ACTH, cortisol, and luteinizing hormone (LH) in humans. They also
stimulate prolactin, growth hormone (GH) secretion, and pancreatic secretion of insulin and
glucagons in humans and other species, rats and dogs. Thyroid stimulating hormone (TSH) has
been shown to be both inhibited and stimulated by opioids.
Immune System
Opioids have been shown to have a variety of effects on components of the immune system in in
vitro and animal models. The clinical significance of these findings is unknown.
Pharmacodynamics
As with all opioids, the minimum effective plasma concentration for analgesia varies widely
among patients, especially among patients who have been previously treated with potent agonist
opioids. As a result, patients must be treated with individualized titration of dosage to the
desired effect. The minimum effective analgesic concentration of morphine for any individual
patient may increase over time due to an increase in pain, the development of new pain
syndrome and/or the development of analgesic tolerance.
Plasma Level-Analgesia Relationships
In any particular patient, both analgesic effects and plasma morphine concentrations are related
to the morphine dose. In non-tolerant individuals, plasma morphine concentration-efficacy
relationships have been demonstrated and suggest that opiate receptors occupy effector
compartments, leading to a lag-time, or hysteresis, between rapid changes in plasma morphine
concentrations and the effects of such changes. The most direct and predictable concentration-
effect relationships can, therefore, be expected at distribution equilibrium and/or steady-state
conditions.
While plasma morphine-efficacy relationships can be demonstrated in non-tolerant individuals,
they are influenced by a wide variety of factors and are not generally useful as a guide to the
clinical use of morphine. The effective dose in opioid-tolerant patients may be significantly
greater than the appropriate dose for opioid-naive individuals. Dosages of morphine should be
chosen and must be titrated on the basis of clinical evaluation of the patient and the balance
between therapeutic and adverse effects.
For any fixed dose and dosing interval, MS CONTIN
®
will have at steady-state, a lower C
max
and
a higher C
min
than conventional morphine.
Concentration - Adverse Experience Relationships
MS CONTIN
®
Tablets are associated with typical opioid-related adverse experiences. There is a
general relationship between increasing morphine plasma concentration and increasing
frequency of dose-related opioid adverse experiences such as nausea, vomiting, CNS effects, and
This label may not be the latest approved by FDA.
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NDA 019516/S-034
Page 7
respiratory depression. In opioid-tolerant patients, the situation is altered by the development of
tolerance to opioid-related side effects, and the relationship is not clinically relevant.
As with all opioids, the dose must be individualized (see DOSAGE AND
ADMINISTRATION), because the effective analgesic dose for some patients will be too high
to be tolerated by other patients.
PHARMACOKINETICS AND METABOLISM
MS CONTIN is a controlled-release tablet containing morphine sulfate. Morphine is released
from MS CONTIN somewhat more slowly than from immediate-release oral preparations.
Following oral administration of a given dose of morphine, the amount ultimately absorbed is
essentially the same whether the source is MS CONTIN or an immediate-release formulation.
Because of pre-systemic elimination (i.e., metabolism in the gut wall and liver) only about 40%
of the administered dose reaches the central compartment.
Variation in the physical/mechanical properties of a formulation of an oral morphine drug
product can affect both its absolute bioavailability and its absorption rate constant (k
a
). The
formulation employed in MS CONTIN has not been shown to affect morphine's oral
bioavailability, but does decrease its apparent k
a
. Other basic pharmacokinetic parameters (e.g.,
volume of distribution [Vd], elimination rate constant [k
e
], clearance [Cl]), are unchanged as
they are fundamental properties of morphine in the organism. However, in chronic use, the
possibility that shifts in metabolite to parent drug ratios may occur cannot be excluded.
When immediate-release oral morphine or MS CONTIN is given on a fixed dosing regimen,
steady-state is achieved in about a day.
For a given dose and dosing interval, the AUC and average blood concentration of morphine at
steady-state (Css) will be independent of the specific type of oral formulation administered so
long as the formulations have the same absolute bioavailability. The absorption rate of a
formulation will, however, affect the maximum (C
max
) and minimum (C
min
) blood levels and the
times of their occurrence.
Absorption
Following the administration of immediate-release oral morphine products, approximately fifty
percent of the morphine that will reach the central compartment intact reaches it within 30
minutes. Following the administration of an equal amount of MS CONTIN to normal
volunteers, however, this extent of absorption occurs, on average, after 1.5 hours.
Food Effects
The possible effect of food upon the systemic bioavailability of MS CONTIN
®
has not been
systematically evaluated for all strengths. One study, conducted with the 30 mg MS CONTIN
Tablets, showed no significant differences in C
max
and AUC
(0-24h)
values, whether the tablet was
taken while fasting or with a high-fat breakfast.
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NDA 019516/S-034
Page 8
Distribution
The volume of distribution (Vd) for morphine is approximately 4 liters per kilogram. Once
absorbed, morphine is distributed to skeletal muscle, kidneys, liver, intestinal tract, lungs, spleen,
and brain. Morphine also crosses the placental membranes and has been found in breast milk.
Metabolism
Although a small fraction (less than 5%) of morphine is demethylated, for all practical purposes,
virtually all morphine is converted to the 3- and 6- (M3G and M6G) glucuronide metabolites.
M3G is present in the highest plasma concentration following oral administration and possesses
no significant analgesic activity. M6G, while possessing analgesic activity, is present in the
plasma in low concentrations.
Excretion
The elimination of morphine occurs primarily as renal excretion of morphine-3- glucuronide and
its terminal elimination half-life after intravenous administration is normally 2 to 4 hours. In
some studies involving longer periods of plasma sampling, a longer terminal half-life of about 15
hours was reported. A small amount of the glucuronide conjugate is excreted in the bile, and
there is some minor enterohepatic recycling. As with any drug, caution should be taken to guard
against unanticipated accumulation if renal and/or hepatic function is seriously impaired.
Special Populations
Renal Impairment
Morphine pharmacokinetics are altered in patients with renal failure. Clearance is decreased and
the metabolites, M3G and M6G, may accumulate to much higher plasma levels in these patients
as compared to patients with normal renal function.
Drug-Drug Interactions
Known drug-drug interactions involving morphine are pharmacodynamic not pharmacokinetic.
INDICATIONS AND USAGE
MS CONTIN Tablets are a controlled-release oral formulation of morphine sulfate indicated for
the management of moderate to severe pain when a continuous, around-the-clock opioid
analgesic is needed for an extended period of time.
MS CONTIN Tablets are NOT intended for use as a prn analgesic.
The MS CONTIN 100 and 200 mg tablet strengths are high dose, controlled-release, oral
morphine formulations indicated for the relief of pain in opioid-tolerant patients only.
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda
This label may not be the latest approved by FDA.
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NDA 019516/S-034
Page 10
Morphine can be abused in a manner similar to other opioid agonists, legal or illicit. This should
be considered when prescribing or dispensing MS CONTIN
®
in situations where the physician or
pharmacist is concerned about an increased risk of misuse, abuse, or diversion.
MS CONTIN can be abused by crushing, chewing, snorting or injecting the dissolved product.
These practices will result in the uncontrolled delivery of the opioid and pose a significant risk to
the abuser that could result in overdose and death (see WARNINGS: Drug Abuse and
Addiction).
Concerns about abuse, addiction, and diversion should not prevent the proper management of
pain.
Healthcare professionals should contact their State Professional Licensing Board, or State
Controlled Substances Authority for information on how to prevent and detect abuse or diversion
of this product.
Interactions with Alcohol and Drugs of Abuse
Morphine may be expected to have additive effects when used in conjunction with alcohol, other
opioids, or illicit drugs that cause central nervous system depression because respiratory
depression, hypotension, and profound sedation or coma may result. (See WARNINGS:
Interactions with other CNS Depressants.)
Drug Abuse and Addiction
MS CONTIN is a mu-agonist opioid with an abuse liability similar to other opioid agonists
and is a Schedule II controlled substance. MS CONTIN and other opioids used in
analgesia, can be abused and are subject to criminal diversion.
Drug addiction is characterized by compulsive use, use for non-medical purposes, and continued
use despite harm or risk of harm. Drug addiction is a treatable disease, utilizing a multi-
disciplinary approach, but relapse is common.
“Drug-seeking” behavior is very common in addicts and drug abusers. Drug-seeking tactics
include emergency calls or visits near the end of office hours, refusal to undergo appropriate
examination, testing or referral, repeated “loss” of prescriptions, tampering with prescriptions
and reluctance to provide prior medical records or contact information for other treating
physician(s). “Doctor shopping” to obtain additional prescriptions is common among drug
abusers and people suffering from untreated addiction.
Abuse and addiction are separate and distinct from physical dependence and tolerance.
Physicians should be aware that addiction may not be accompanied by concurrent tolerance and
symptoms of physical dependence in all addicts. In addition, abuse of opioids can occur in the
absence of true addiction and is characterized by misuse for non-medical purposes, often in
combination with other psychoactive substances. MS CONTIN
®
, like other opioids, has been
diverted for non-medical use. Careful record keeping of prescribing information, including
quantity, frequency, and renewal requests is strongly advised.
This label may not be the latest approved by FDA.
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NDA 019516/S-034
Page 11
Proper assessment of the patient, proper prescribing practices, periodic re-evaluation of therapy,
and proper dispensing and storage are appropriate measures that help to limit abuse of opioid
drugs.
MS CONTIN is intended for oral use only as an intact tablet. Abuse of the crushed tablet
poses a hazard of overdose and death. This risk is increased with concurrent abuse of
alcohol and other substances. Due to the presence of talc as one of the excipients in tablets,
parenteral abuse can be expected to result in local tissue necrosis, infection, pulmonary
granulomas, and increased risk of endocarditis and valvular heart injury. Parenteral drug
abuse is commonly associated with transmission of infectious diseases such as hepatitis and
HIV.
Respiratory Depression
Respiratory depression is the chief hazard of all morphine preparations. Respiratory depression
occurs most frequently in the elderly and debilitated patients as well as in those suffering from
conditions accompanied by hypoxia or hypercapnia when even moderate therapeutic doses may
dangerously decrease pulmonary ventilation.
Morphine should be used with extreme caution in patients with chronic obstructive pulmonary
disease or cor pulmonale, and in patients having a substantially decreased respiratory reserve,
hypoxia, hypercapnia, or pre-existing respiratory depression. In such patients, even usual
therapeutic doses of morphine may decrease respiratory drive while simultaneously increasing
airway resistance to the point of apnea.
Head Injury and Increased Intracranial Pressure
The respiratory depressant effects of morphine with carbon dioxide retention and secondary
elevation of cerebrospinal fluid pressure may be markedly exaggerated in the presence of head
injury, other intracranial lesions, or pre-existing increase in intracranial pressure. Morphine
produces effects which may obscure neurologic signs of further increases in pressure in patients
with head injuries.
Hypotensive Effect
MS CONTIN
®
, like all opioid analgesics, may cause severe hypotension in an individual whose
ability to maintain his blood pressure has already been compromised by a depleted blood
volume, or a concurrent administration of drugs such as phenothiazines or general anesthetics.
MS CONTIN may produce orthostatic hypotension in ambulatory patients.
MS CONTIN, like all opioid analgesics, should be administered with caution to patients in
circulatory shock, since vasodilation produced by the drug may further reduce cardiac output and
blood pressure.
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NDA 019516/S-034
Page 12
Interactions with other CNS Depressants
MS CONTIN, like all opioid analgesics, should be used with great caution and in reduced dosage
in patients who are concurrently receiving other central nervous system depressants including
sedatives or hypnotics, general anesthetics, phenothiazines, other tranquilizers, and alcohol
because respiratory depression, hypotension, and profound sedation or coma may result.
Other
Although extremely rare, cases of anaphylaxis have been reported.
PRECAUTIONS (See also: CLINICAL PHARMACOLOGY)
Special precautions regarding MS CONTIN 100 mg and 200 mg Tablets
MS CONTIN 100 mg and 200 mg Tablets are for use only in opioid-tolerant patients
requiring daily morphine equivalent dosages of 200 or more for the 100 mg tablet and 400
mg or more for the 200 mg tablet. Care should be taken in its prescription and patients
should be instructed against use by individuals other than the patient for whom it was
prescribed, as this may have severe medical consequences for that individual.
General
MS CONTIN Tablets are a controlled-release oral formulation of morphine sulfate indicated for
the management of moderate to severe pain when a continuous, around-the-clock analgesic is
needed for an extended period of time. MS CONTIN does not release morphine continuously
over the course of a dosing interval. The administration of single doses of MS CONTIN on a
q12h dosing schedule will result in higher peak and lower trough plasma levels than those that
occur when an identical daily dose of morphine is administered using conventional oral
formulations on a q4h regimen. The clinical significance of greater fluctuations in morphine
plasma level has not been systematically evaluated. (See DOSAGE AND
ADMINISTRATION.)
Selection of patients for treatment with MS CONTIN
®
should be governed by the same
principles that apply to the use of morphine or other potent opioid analgesics. Specifically, the
increased risks associated with its use in the following populations should be considered: the
elderly or debilitated and those with severe impairment of hepatic, pulmonary, or renal function;
myxedema or hypothyroidism; adrenocortical insufficiency (e.g., Addison's Disease); CNS
depression or coma; toxic psychosis; prostatic hypertrophy or urethral stricture; acute
alcoholism; delirium tremens; kyphoscoliosis or inability to swallow.
The administration of morphine, like all opioid analgesics, may obscure the diagnosis or clinical
course in patients with acute abdominal conditions.
Morphine may aggravate convulsions in patients with convulsive disorders, and all opioids may
induce or aggravate seizures in some clinical settings.
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NDA 019516/S-034
Page 13
Interactions with Mixed Agonist/Antagonist Opioid Analgesics
Agonist/antagonist analgesics (i.e., pentazocine, nalbuphine, and butorphanol) should be
administered with caution to a patient who has received or is receiving a course of therapy with a
pure opioid agonist analgesic such as morphine sulfate. In this situation, mixed
agonist/antagonist analgesics may reduce the analgesic effect of morphine sulfate and/or may
precipitate withdrawal symptoms in these patients.
Use in Pancreatic/Biliary Tract Disease
Morphine should be used with caution in patients about to undergo surgery of the biliary tract
since it may cause spasm of the sphincter of Oddi. Similarly, morphine should be used with
caution in patients with acute pancreatitis secondary to biliary tract disease.
Tolerance
Tolerance is a state of adaptation in which exposure to a drug induces changes that result in a
diminution of one or more of the drug’s effects over time. Tolerance may occur to both the
desired and undesired effects of drugs, and may develop at different rates for different effects.
Physical Dependence
Physical dependence is a state of adaptation that is manifested by an opioid specific withdrawal
syndrome that can be produced by abrupt cessation, rapid dose reduction, decreasing blood level
of the drug, and/or administration of an antagonist.
The opioid abstinence or withdrawal syndrome is characterized by some or all of the following:
restlessness, lacrimation, rhinorrhea, yawning, perspiration, chills, piloerection, myalgia,
mydriasis, irritability, anxiety, backache, joint pain, weakness, abdominal cramps, insomnia,
nausea, anorexia, vomiting, diarrhea, or increased blood pressure, respiratory rate, or heart rate.
In general, opioids should not be abruptly discontinued (see DOSAGE AND
ADMINISTRATION: Cessation of Therapy).
Information for Patients/Caregivers
If clinically advisable, patients receiving MS CONTIN
®
or their caregivers should be given the
following information by the physician, nurse, or pharmacist:
1. Patients should be advised that MS CONTIN Tablets contain morphine and should be taken
only as directed.
2. Patients should be advised that MS CONTIN Tablets were designed to work properly only if
swallowed whole. MS CONTIN Tablets will release all of their morphine if split, divided,
broken, chewed, dissolved, or crushed resulting in the risk of a fatal overdose.
3. Patients should be advised not to change the dose of MS CONTIN without consulting their
physician.
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 14
4. Patients should be advised to report episodes of breakthrough pain and adverse experiences
occurring during therapy. Individualization of dosage is essential to make optimal use of this
medication.
5. MS CONTIN may impair mental and/or physical ability required for the performance of potentially hazardous
tasks (e.g., driving, operating machinery). Patients started on MS CONTIN or whose dose has been changed
should refrain from dangerous activity until it is established that they are not adversely affected.
6. MS CONTIN should not be taken with alcohol or other CNS depressants (sleep aids, tranquilizers) except by the
orders of the prescribing physician because dangerous additive effects may occur resulting in serious injury or
death.
7. Women of childbearing potential who become or are planning to become pregnant should be advised to consult
their physician regarding the effects of analgesics and other drug use during pregnancy on themselves and their
unborn child.
8. Patients should be advised that if they have been receiving treatment with MS CONTIN for more than a few
weeks and cessation of therapy is indicated, it may be appropriate to taper the MS CONTIN dose, rather than
abruptly discontinue it, due to the risk of precipitating withdrawal symptoms. Their physician can provide a
dose schedule to accomplish a gradual discontinuation of the medication.
9. MS CONTIN 100 mg and 200 mg Tablets are for use only in opioid-tolerant patients requiring daily morphine
equivalent dosages of 200 mg or more for the 100 mg tablet and 400 mg or more for the 200 mg tablet. Special
care must be taken to avoid accidental ingestion or the use by individuals (including children) other than the
patient for whom it was originally prescribed, as such unsupervised use may have severe, even fatal,
consequences.
10. Patients should be advised that MS CONTIN
®
is a potential drug of abuse. They should
protect it from theft, and it should never be given to anyone other than the individual for
whom it was prescribed.
11. Patients should be advised that they may pass empty matrix "ghosts" (tablets) via colostomy
or in the stool, and that this is of no concern since the active medication has already been
absorbed.
12. Patients should be instructed to keep MS CONTIN in a secure place out of the reach of
children. When MS CONTIN is no longer needed, the unused tablets should be destroyed by
flushing down the toilet.
Use in Drug and Alcohol Addiction
MS CONTIN is an opioid with no approved use in the management of addiction disorders. Its
proper usage in individuals with drug or alcohol dependence, either active or in remission, is for
the management of pain requiring opioid analgesia.
This label may not be the latest approved by FDA.
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NDA 019516/S-034
Page 15
Drug Interactions (See also: WARNINGS)
Use with CNS Depressants
The concomitant use of other central nervous system depressants including sedatives or
hypnotics, general anesthetics, phenothiazines, tranquilizers, and alcohol may produce additive
depressant effects. Respiratory depression, hypotension, and profound sedation or coma may
occur. When such combined therapy is contemplated, the dose of one or both agents should be
reduced. Opioid analgesics, including MS CONTIN, may enhance the neuromuscular blocking
action of skeletal muscle relaxants and produce an increased degree of respiratory depression.
Carcinogenicity/Mutagenicity/Impairment of Fertility
Studies of morphine sulfate in animals to evaluate the drug's carcinogenic and mutagenic
potential or the effect on fertility have not been conducted.
Pregnancy
Teratogenic Effects - CATEGORY C
Adequate animal studies on reproduction have not been performed to determine whether
morphine affects fertility in males or females. There are no well-controlled studies in women,
but marketing experience does not include any evidence of adverse effects on the fetus following
routine (short-term) clinical use of morphine sulfate products. Although there is no clearly
defined risk, such experience cannot exclude the possibility of infrequent or subtle damage to the
human fetus.
MS CONTIN
®
should be used in pregnant women only if the need for strong opioid analgesia
clearly outweighs the potential risk to the fetus. (See also: PRECAUTIONS: Labor and
Delivery, and WARNINGS: DRUG ABUSE AND ADDICTION.)
Labor and Delivery
MS CONTIN is not recommended for use in women during and immediately prior to labor.
Occasionally, opioid analgesics may prolong labor through actions which temporarily reduce the
strength, duration, and frequency of uterine contractions. However, this effect is not consistent
and may be offset by an increased rate of cervical dilatation which tends to shorten labor.
Neonates whose mothers received opioid analgesics during labor should be observed closely for
signs of respiratory depression. A specific narcotic antagonist, naloxone, should be available for
reversal of narcotic-induced respiratory depression in the neonate.
Neonatal Withdrawal Syndrome
Chronic maternal use of opioids during pregnancy can affect the fetus with subsequent
withdrawal symptoms. Neonatal withdrawal syndrome presents as irritability, hyperactivity and
This label may not be the latest approved by FDA.
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NDA 019516/S-034
Page 16
abnormal sleep pattern, abnormal crying, tremor, vomiting, diarrhea and subsequent weight loss
or failure to gain weight, and may result in death. The onset, duration and severity of neonatal
withdrawal syndrome varies based on the drug used, duration of use, the dose of last maternal
use, and rate of elimination by the newborn. Use standard care as medically appropriate.
Nursing Mothers
Low levels of morphine have been detected in the breast milk. Withdrawal symptoms can occur
in breast-feeding infants when maternal administration of morphine sulfate is stopped.
Ordinarily, nursing should not be undertaken while a patient is receiving MS CONTIN since
morphine may be excreted in the milk.
Pediatric Use
Safety and effectiveness in pediatric patients have not been established.
MS CONTIN Tablets are not to be chewed, crushed, dissolved or divided for
administration.
Geriatric Use
Clinical studies of MS CONTIN did not include sufficient numbers of subjects aged 65 and over
to determine whether they respond differently from younger subjects. Other reported clinical
experience has not identified differences in responses between the elderly and younger patients.
In general, dose selection for an elderly patient should be cautious, usually starting at the low end
of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac
function, and of concomitant disease or other drug therapy.
ADVERSE REACTIONS
The adverse reactions caused by morphine are essentially those observed with other opioid
analgesics. They include the following major hazards: respiratory depression, apnea, and to a
lesser degree, circulatory depression, respiratory arrest, shock, and cardiac arrest.
Most Frequently Observed
Constipation, lightheadedness, dizziness, sedation, nausea, vomiting, sweating, dysphoria, and
euphoria.
Some of these effects seem to be more prominent in ambulatory patients and in those not
experiencing severe pain. Some adverse reactions in ambulatory patients may be alleviated if the
patient lies down.
Less Frequently Observed Reactions
Central Nervous System: Weakness, headache, agitation, tremor, uncoordinated muscle
movements, seizure, alterations of mood (nervousness, apprehension, depression, floating
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NDA 019516/S-034
Page 17
feelings), dreams, muscle rigidity, transient hallucinations and disorientation, visual
disturbances, insomnia, increased intracranial pressure
Gastrointestinal: Dry mouth, biliary tract spasm, laryngospasm, anorexia, diarrhea, cramps,
taste alteration, constipation, ileus, intestinal obstruction, dyspepsia, increases in hepatic
enzymes
Cardiovascular: Flushing of the face, chills, tachycardia, bradycardia, palpitation, faintness,
syncope, hypotension, hypertension
Genitourinary:Urine retention or hesitance, amenorrhea, reduced libido and/or potency
Dermatologic: Pruritus, urticaria, other skin rashes, edema, diaphoresis
Other: Antidiuretic effect, paresthesia, bronchospasm, muscle tremor, blurred vision, nystagmus,
diplopia, miosis, anaphylaxis, malaise, thinking disturbances, vertigo
OVERDOSAGE
Acute overdosage with morphine can be manifested by respiratory depression, somnolence
progressing to stupor or coma, skeletal muscle flaccidity, cold and clammy skin, constricted
pupils, rhabdomyolysis progressing to renal failure, and, sometimes, bradycardia, hypotension
and death.
The nature of the controlled-release morphine should also be taken into account when treating
the overdose. Even in the face of improvement, continued medical monitoring is required
because of the possibility of extended effects. Deaths due to overdose may occur with abuse and
misuse of MS CONTIN Tablets.
In the treatment of morphine overdosage, primary attention should be given to the re-
establishment of a patent airway and institution of assisted or controlled ventilation. Supportive
measures (including oxygen, vasopressors) should be employed in the management of
circulatory shock and pulmonary edema accompanying overdose as indicated. Cardiac arrest or
arrhythmias may require cardiac massage or defibrillation.
The pure opioid antagonists, such as naloxone, are specific antidotes against respiratory
depression which results from opioid overdose. Naloxone should be administered intravenously;
however, because its duration of action is relatively short, the patient must be carefully
monitored until spontaneous respiration is reliably re-established. If the response to naloxone is
suboptimal or not sustained, additional naloxone may be administered, as needed, or given by
continuous infusion to maintain alertness and respiratory function; however, there is no
information available about the cumulative dose of naloxone that may be safely administered.
Opioid antagonists should not be administered in the absence of clinically significant respiratory
or circulatory depression secondary to morphine overdose. Such agents should be administered
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 18
cautiously to persons who are known, or suspected to be physically-dependent on MS
CONTIN
®
. In such cases, an abrupt or complete reversal of opioid effects may precipitate an
acute abstinence syndrome.
Note: In an individual physically dependent on opioids,
administration of the usual dose of the antagonist will precipitate
an acute withdrawal syndrome. The severity of the withdrawal
syndrome produced will depend on the degree of physical
dependence and the dose of the antagonist administered. Use of an
opioid antagonist in such a person should be avoided. If necessary
to treat serious respiratory depression in the physically dependent
patient, the antagonist should be administered with care and by
titration with smaller than usual doses of the antagonist.
DOSAGE AND ADMINISTRATION
(SEE ALSO: CLINICAL PHARMACOLOGY, WARNINGS, AND PRECAUTIONS
SECTIONS)
MS CONTIN IS AN OPIOID AGONIST AND A SCHEDULE II CONTROLLED
SUBSTANCE WITH AN ABUSE LIABILITY SIMILAR TO OTHER OPIOID
AGONISTS. MORPHINE AND OTHER OPIOIDS USED IN ANALGESIA CAN BE
ABUSED AND ARE SUBJECT TO CRIMINAL DIVERSION.
MS CONTIN TABLETS ARE TO BE SWALLOWED WHOLE, AND ARE NOT TO BE
BROKEN, CHEWED, DISSOLVED OR CRUSHED. TAKING BROKEN, CHEWED,
DISSOLVED, OR CRUSHED MS CONTIN TABLETS LEADS TO RAPID RELEASE
AND ABSORPTION OF A POTENTIALLY FATAL DOSE OF MORPHINE.
Physicians should individualize treatment in every case, initiating therapy at the
appropriate point along a progression from non-opioid analgesics, such as non-steroidal
anti-inflammatory drugs and acetaminophen to opioids in a plan of pain management such
as those outlined by the World Health Organization, the Federation of State Medical
Boards Model Guidelines, or the American Pain Society. Healthcare professionals should
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For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 19
follow appropriate pain management principles of careful assessment and ongoing
monitoring (see BOXED WARNING).
MS CONTIN
®
Tablets are a controlled-release oral formulation of morphine sulfate indicated for
the management of moderate to severe pain when a continuous, around-the-clock analgesic is
needed for an extended period of time. The controlled-release nature of the formulation allows it
to be administered on a more convenient schedule than conventional immediate-release oral
morphine products. (See CLINICAL PHARMACOLOGY; PHARMACOKINETICS AND
METABOLISM.) However, MS CONTIN does not release morphine continuously over the
course of a dosing interval. The administration of single doses of MS CONTIN on a q12h
dosing schedule will result in higher peak and lower trough plasma levels than those that occur
when an identical daily dose of morphine is administered using conventional oral formulations
on a q4h regimen. The clinical significance of greater fluctuations in morphine plasma level has
not been systematically evaluated.
As with any potent opioid drug product, it is critical to adjust the dosing regimen for each patient
individually, taking into account the patient's prior opioid and non-opioid analgesic treatment
experience. Although it is clearly impossible to enumerate every consideration that is important
to the selection of initial dose and dosing interval of MS CONTIN, attention should be given to
1) the daily dose, potency, and precise characteristics of the opioid the patient has been taking
previously (e.g., whether it is a pure agonist or mixed agonist/antagonist), 2) the reliability of the
relative potency estimate used to calculate the dose of morphine needed [N.B. potency estimates
may vary with the route of administration], 3) the degree of opioid tolerance, if any, and 4) the
general condition and medical status of the patient.
The following dosing recommendations, therefore, can only be considered suggested approaches
to what is actually a series of clinical decisions in the management of the pain of an individual
patient.
During periods of changing analgesic requirements including initial titration, frequent contact is
recommended between physician, other members of the healthcare team, the patient, and the
caregiver/family.
Conversion from Immediate-Release Oral Morphine to MS CONTIN
A patient's daily morphine requirement is established using immediate-release oral morphine
(dosing every 4 to 6 hours). The patient is then converted to MS CONTIN
®
in either of two
ways: 1) by administering one-half of the patient's 24-hour requirement as MS CONTIN on an
every 12-hour schedule; or, 2) by administering one-third of the patient's daily requirement as
MS CONTIN on an every eight hour schedule. With either method, dose and dosing interval is
then adjusted as needed (see discussion below). The 15 mg tablet should be used for initial
conversion for patients whose total daily requirement is expected to be less than 60 mg. The 30
mg tablet strength is recommended for patients with a daily morphine requirement of 60 to 120
mg. When the total daily dose is expected to be greater than 120 mg, the appropriate
combination of tablet strengths should be employed.
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For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 20
Conversion from Parenteral Morphine or Other Opioids (Parenteral or Oral) to
MS CONTIN
MS CONTIN can be administered as the initial oral morphine drug product; in this case,
however, particular care must be exercised in the conversion process. Because of uncertainty
about, and intersubject variation in, relative estimates of opioid potency and cross tolerance,
initial dosing regimens should be conservative. It is better to underestimate the 24-hour oral
morphine requirement than to overestimate. To this end, initial individual doses of MS CONTIN
should be estimated conservatively. In patients whose daily morphine requirements are expected
to be less than or equal to 120 mg per day, the 30 mg tablet strength is recommended for the
initial titration period. Once a stable dose regimen is reached, the patient can be converted to the
60 mg or 100 mg tablet strength, or an appropriate combination of tablet strengths, if desired.
Estimates of the relative potency of opioids are only approximate and are influenced by route of
administration, individual patient differences, and possibly, by an individual's medical condition.
Consequently, it is difficult to recommend any fixed rule for converting a patient to MS
CONTIN directly. The following general points should be considered, however.
1. Parenteral to oral morphine ratio: Estimates of the oral to parenteral potency of morphine
vary. Some authorities suggest that a dose of oral morphine only three times the daily
parenteral morphine requirement may be sufficient in chronic use settings.
2. Other parenteral or oral opioids to oral morphine: Because there is lack of systematic
evidence bearing on these types of analgesic substitutions, specific recommendations are not
possible.
Physicians are advised to refer to published relative potency data, keeping in mind that such ratios are only approximate. In general, it is safer to
underestimate the daily dose of MS CONTIN required and rely upon ad hoc supplementation to deal with inadequate analgesia. (See discussion
which follows.)
Use of MS CONTIN as the First Opioid Analgesic
There has been no systematic evaluation of MS CONTIN as an initial opioid analgesic in the
management of pain. Because it may be more difficult to titrate a patient using a controlled-
release morphine, it is ordinarily advisable to begin treatment using an immediate-release
formulation. (See Special Instructions for MS CONTIN
®
100 and 200 mg Tablets)
Considerations in the Adjustment of Dosing Regimens
Whatever the approach, if signs of excessive opioid effects are observed early in a dosing
interval, the next dose should be reduced. If this adjustment leads to inadequate analgesia, that
is, "breakthrough" pain occurs late in the dosing interval, the dosing interval may be shortened.
Alternatively, a supplemental dose of a short-acting analgesic may be given. As experience is
gained, adjustments can be made to obtain an appropriate balance between pain relief, opioid
side effects, and the convenience of the dosing schedule.
In adjusting dosing requirements, it is recommended that the dosing interval never be extended
beyond 12 hours because the administration of very large single doses may lead to acute
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 21
overdose. (N.B. MS CONTIN is a controlled-release formulation; it does not release morphine
continuously over the dosing interval.)
For patients with low daily morphine requirements, the 15 mg tablet should be used.
Special Instructions for MS CONTIN 100 and 200 mg Tablets
(For use in opioid-tolerant patients only.)
MS CONTIN 100 mg and 200 mg tablets are for use only in opioid-tolerant patients
requiring daily morphine equivalent dosages of 200 mg or more for the 100 mg tablet and
400 mg or more for the 200 mg tablet. It is recommended that these strengths be reserved
for patients that have already been titrated to a stable analgesic regimen using lower
strengths of MS CONTIN or other opioids.
Supplemental Analgesia
Most patients given around-the-clock therapy with controlled-release opioids may need to have
immediate-release medication available for exacerbations of pain or to prevent pain that occurs
predictably during certain patient activities (including incident pain).
Continuation of Therapy
The intent of the titration period is to establish a patient-specific daily dose that will provide
adequate analgesia with acceptable side effects and minimal rescue doses (2 or less) for as long
as pain relief is necessary. Should pain recur, the dose can be increased to re-establish pain
control as outlined above. During chronic, around-the-clock opioid therapy, especially for non-
cancer pain syndromes, the continued need for around-the-clock opioid therapy should be
reassessed periodically (e.g. every 6 to 12 months) as appropriate.
Cessation of Therapy
When the patient no longer requires therapy with MS CONTIN
®
tablets, doses should be
tapered gradually to prevent signs and symptoms of withdrawal in the physically
dependent patient.
Conversion from MS CONTIN to Parenteral Opioids
When converting a patient from MS CONTIN to parenteral opioids, it is best to assume that the
parenteral to oral potency is high. NOTE THAT THIS IS THE CONVERSE OF THE
STRATEGY USED WHEN THE DIRECTION OF CONVERSION IS FROM THE
PARENTERAL TO ORAL FORMULATIONS. IN BOTH CASES, HOWEVER, THE AIM IS
TO ESTIMATE THE NEW DOSE CONSERVATIVELY. For example, to estimate the
required 24-hour dose of morphine for IM use, one could employ a conversion of 1 mg of
morphine IM for every 6 mg of morphine as MS CONTIN. The IM 24-hour dose would have to
be divided by six and administered on a q4h regimen. This approach is recommended because it
is least likely to cause overdose.
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For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 22
SAFETY AND HANDLING
MS CONTIN Tablets contain morphine sulfate which is a controlled substance under Schedule II
of the Controlled Substances Act. Morphine, like all opioids, is liable to diversion and misuse
and should be handled accordingly. Patients and their families should be instructed to flush any
unneeded MS CONTIN tablets down the toilet.
MS CONTIN may be targeted for theft and diversion by criminals. Healthcare professionals
should contact their State Professional Licensing Board or State Controlled Substances Authority
for information on how to prevent and detect abuse or diversion of this product.
MS CONTIN TABLETS ARE TO BE SWALLOWED WHOLE, AND ARE NOT TO BE
BROKEN, CHEWED, DISSOLVED, OR CRUSHED. TAKING BROKEN, CHEWED,
DISSOLVED, OR CRUSHED MS CONTIN TABLETS LEADS TO RAPID RELEASE
AND ABSORPTION OF A POTENTIALLY FATAL DOSE OF MORPHINE.
MS CONTIN 100 mg and 200 mg tablets are for use only in opioid-tolerant patients
requiring daily morphine equivalent dosages of 200 mg or more for the 100 mg tablet and
400 mg or more for the 200 mg tablet. This strength is potentially fatal if accidentally
ingested and patients and their families should be instructed to take special care to avoid
accidental or intentional ingestion by individuals other than those for whom the medication
was originally prescribed.
HOW SUPPLIED
MS CONTIN
®
(morphine sulfate controlled-release) Tablets 15 mg are round, blue-colored,
film-coated tablets bearing the symbol PF on one side and M 15 on the other. They are supplied
as follows:
NDC 59011-260-10: opaque plastic bottles containing 100 tablets
NDC 59011-260-05: opaque plastic bottles containing 500 tablets
MS CONTIN
®
(morphine sulfate controlled-release) Tablets 30 mg are round, lavender-colored,
film-coated tablets bearing the symbol PF on one side and M 30 on the other. They are supplied
as follows:
NDC 59011-261-25: opaque plastic bottles containing 100 tablets
NDC 59011-261-05: opaque plastic bottles containing 500 tablets
MS CONTIN
®
(morphine sulfate controlled-release) Tablets 60 mg are round, orange-colored,
film-coated tablets bearing the symbol PF on one side and M 60 on the other. They are supplied
as follows:
NDC 59011-262-10: opaque plastic bottles containing 100 tablets
NDC 59011-262-05: opaque plastic bottles containing 500 tablets
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda
NDA 019516/S-034
Page 23
MS CONTIN
®
(morphine sulfate controlled-release) Tablets 100 mg are round, gray-colored,
film-coated tablets bearing the symbol PF on one side and 100 on the other. They are supplied as
follows:
NDC 59011-263-10: opaque plastic bottles containing 100 tablets
NDC 59011-263-05: opaque plastic bottles containing 500 tablets
MS CONTIN
®
(morphine sulfate controlled-release) Tablets 200 mg are capsule-shaped, green-
colored, film-coated tablets bearing the symbol PF on one side and M 200 on the other. They are
supplied as follows:
NDC 59011-264-10: opaque plastic bottles containing 100 tablets
Store at 25°C (77°F); excursions permitted between 15°-30°C (59°-86°F).
Dispense in a tight, light-resistant container.
Healthcare professionals can telephone Purdue Pharma’s Medical Services Department (1-888-
726-7535) for information on this product.
CAUTION
DEA Order Form Required.
Purdue Pharma L.P.
Stamford, CT 06901-3431
©2009, Purdue Pharma L.P.
March 4, 2009
301617-0B
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda