General
KADIAN® is intended for use in patients who require continuous,
around-the-clock opioid analgesia for an extended period of time. As with any
potent opioid, it is critical to adjust the dosing regimen for KADIAN® for each
patient, taking into account the patient's prior analgesic treatment
experience. Although it is clearly impossible to enumerate every consideration
that is important to the selection of the initial dose of KADIAN®, attention
should be given to the points under DOSAGE AND ADMINISTRATION.
Opioid analgesics have a narrow therapeutic index in certain patient
populations, especially when combined with CNS depressant drugs, and should be
reserved for cases where the benefits of opioid analgesia outweigh the known
risks of respiratory depression, altered mental state, and postural
hypotension.
Selection of patients for treatment with KADIAN® should be governed by the
same principles that apply to the use of any 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; 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 KADIAN® may obscure the diagnosis or clinical course in
patients with acute abdominal conditions.
KADIAN® may aggravate pre-existing convulsions in patients with convulsive
disorders.
Cordotomy
Patients taking KADIAN® who are scheduled for cordotomy or other
interruption of pain transmission pathways should have KADIAN® ceased 24 hours
prior to the procedure and the pain controlled by parenteral short-acting
opioids. In addition, the post-procedure titration of analgesics for such
patients should be individualized to avoid either oversedation or withdrawal
syndromes.
Use in Pancreatic/Biliary Tract Disease
KADIAN® may cause spasm of the sphincter of Oddi and should be
used with caution in patients with biliary tract disease, including acute
pancreatitis. Opioids may cause increases in the serum amylase level.
Tolerance and Physical Dependence
Tolerance is the need for increasing doses of opioids to maintain
a defined effect such as analgesia (in the absence of disease progression or
other external factors). Physical dependence is manifested by withdrawal
symptoms after abrupt discontinuation of a drug or upon administration of an
antagonist. Physical dependence and tolerance are not unusual during chronic
opioid therapy.
The opioid abstinence or withdrawal syndrome is characterized by some or all
of the following: restlessness, lacrimation, rhinorrhea, yawning, perspiration,
chills, myalgia, and mydriasis. Other symptoms also may develop, including:
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).
Special Risk Groups
KADIAN® should be administered with caution, and in reduced
dosages in elderly or debilitated patients; patients with severe renal or
hepatic insufficiency; patients with Addison's disease; myxedema;
hypothyroidism; prostatic hypertrophy or urethral stricture.
Caution should also be exercised in the administration of KADIAN® to patients
with CNS depression, toxic psychosis, acute alcoholism and delirium tremens, and
convulsive disorders.
Driving and Operating Machinery
KADIAN® may impair the mental and/or physical abilities needed to
perform potentially hazardous activities such as driving a car or operating
machinery. Patients must be cautioned accordingly. Patients should also be
warned about the potential combined effects of KADIAN® with other CNS
depressants, including other opioids, phenothiazines, sedative/hypnotics and
alcohol (see Drug
Interactions).
Information for Patients
If clinically advisable, patients receiving KADIAN®, or their
caregivers should be given the following information by the physician, nurse, or
pharmacist:
Patients should be advised that KADIAN® contains morphine and
should be taken only as directed.
Patients should be advised that KADIAN® capsules should be
swallowed whole (not chewed, crushed, or dissolved). Alternately, KADIAN®
capsules may be opened and the entire contents sprinkled on a small amount of
apple sauce immediately prior to ingestion. KADIAN® capsules or the contents of
the capsules must not be chewed or crushed due to a risk of fatal
overdose.
Patients should be advised that KADIAN® 100 mg and 200 mg
Capsules are for use only in opioid-tolerant patients. Special care must be
taken to avoid accidental ingestion or 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.
Patients should be advised that the dose of KADIAN® should not be
adjusted without consulting the prescribing health care provider.
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.
Patients should be advised that KADIAN® may impair mental and/or
physical ability required for the performance of potentially hazardous tasks
(e.g., driving, operating machinery). Patients started on KADIAN® or whose dose
has been changed should refrain from dangerous activity until it is established
that they are not adversely affected.
Patients should be advised that KADIAN® should not be taken with
alcohol or other CNS depressants (sleeping medication, tranquilizers) except by
the orders of the prescribing healthcare provider because dangerous additive
effects may occur resulting in serious injury or death.
Women of childbearing potential who become or are planning to
become pregnant, should consult their prescribing healthcare provider prior to
initiating or continuing therapy with KADIAN®.
Patients should be advised that if they have been receiving
treatment with KADIAN® for more than a few weeks and cessation of therapy is
indicated, it may be appropriate to taper the KADIAN® dose, rather than abruptly
discontinue it, due to the risk of precipitating withdrawal symptoms. Their
prescribing healthcare provider should provide a dose schedule to accomplish a
gradual discontinuation of the medication.
Patients should be advised that KADIAN® 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.
Patients should be advised that severe constipation could occur
as a result of taking KADIAN® and appropriate laxatives, stool softeners and
other appropriate treatments should be initiated from the beginning of opioid
therapy.
Patients should be instructed to keep KADIAN® in a secure place
out of the reach of children. When KADIAN® is no longer needed, the unused
capsules should be destroyed by flushing down the toilet.
Drug Interactions
CNS Depressants: Morphine should be used with great caution and
in reduced dosage in patients who are concurrently receiving other central
nervous system (CNS) depressants including sedatives, hypnotics, general
anesthetics, antiemetics, phenothiazines, other tranquilizers and alcohol
because of the risk of respiratory depression, hypotension and profound sedation
or coma. When such combined therapy is contemplated, the initial dose of one or
both agents should be reduced by at least 50%.
Muscle Relaxants: KADIAN® may enhance the neuromuscular blocking action of
skeletal relaxants and produce an increased degree of respiratory
depression.
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 KADIAN®. In this situation, mixed
agonist/antagonist analgesics may reduce the analgesic effect of KADIAN® and/or
may precipitate withdrawal symptoms in these patients.
Monoamine Oxidase Inhibitors (MAOIs): MAOIs have been reported to intensify
the effects of at least one opioid drug causing anxiety, confusion and
significant depression of respiration or coma. KADIAN® should not be used in
patients taking MAOIs or within 14 days of stopping such treatment.
Cimetidine: There is an isolated report of confusion and severe respiratory
depression when a hemodialysis patient was concurrently administered morphine
and cimetidine.
Diuretics: Morphine can reduce the efficacy of diuretics by inducing the
release of antidiuretic hormone. Morphine may also lead to acute retention of
urine by causing spasm of the sphincter of the bladder, particularly in men with
prostatism.
Carcinogenicity/Mutagenicity/Impairment of Fertility
Long-term studies in animals to evaluate the carcinogenic
potential of morphine have not been conducted. There are no reports of
carcinogenic effects in humans. In vitro studies have
reported that morphine is non-mutagenic in the Ames test with Salmonella, and induces chromosomal aberrations in human
leukocytes and lethal mutation induction in Drosophila.
Morphine was found to be mutagenic in vitro in
human T-cells, increasing the DNA fragmentation. In vivo,
morphine was mutagenic in the mouse micronucleus test and induced
chromosomal aberrations in spermatids and murine lymphocytes. Chronic opioid
abusers (e.g., heroin abusers) and their offspring display higher rates of
chromosomal damage. However, the rates of chromosomal abnormalities were similar
in nonexposed individuals and in heroin users enrolled in long term opioid
maintenance programs.
PregnancyTeratogenic Effects (Pregnancy Category C)
Teratogenic effects of morphine have been reported in the animal
literature. High parental doses during the second trimester were teratogenic in
neurological, soft and skeletal tissue. The abnormalities included
encephalopathy and axial skeletal fusions. These doses were often maternally
toxic and were 0.3 to 3-fold the maximum recommended human dose (MRHD) on a
mg/m2 basis. The relative contribution of
morphine-induced maternal hypoxia and malnutrition, each of which can be
teratogenic, has not been clearly defined. Treatment of male rats with
approximately 3-fold the MRHD for 10 days prior to mating decreased litter size
and viability.
Nonteratogenic Effects
Morphine given subcutaneously, at non-maternally toxic doses, to
rats during the third trimester with approximately 0.15-fold the MRHD caused
reversible reductions in brain and spinal cord volume, and testes size and body
weight in the offspring, and decreased fertility in female offspring. The
offspring of rats and hamsters treated orally or intraperitoneally throughout
pregnancy with 0.04- to 0.3-fold the MRHD of morphine have demonstrated delayed
growth, motor and sexual maturation and decreased male fertility. Chronic
morphine exposure of fetal animals resulted in mild withdrawal, altered reflex
and motor skill development, and altered responsiveness to morphine that
persisted into adulthood.
There are no well-controlled studies of chronic in utero
exposure to morphine sulfate in human subjects. However, uncontrolled
retrospective studies of human neonates chronically exposed to other opioids
in utero, demonstrated reduced brain volume which
normalized over the first month of life. Infants born to opioid-abusing mothers
are more often small for gestational age, have a decreased ventilatory response
to CO2 and increased risk of sudden infant death
syndrome. KADIAN® should only be used during pregnancy if the need for strong
opioid analgesia justifies the potential risk to the fetus.
Labor and Delivery
KADIAN® is not recommended for use in women during and
immediately prior to labor, where shorter acting analgesics or other analgesic
techniques are more appropriate. 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 opioid
antagonist, such as naloxone or nalmefene, should be available for reversal of
opioid-induced respiratory depression in the neonate.
Neonatal Withdrawal Syndrome
Chronic maternal use of opiates or opioids during pregnancy
coexposes the fetus. The newborn may experience subsequent neonatal withdrawal
syndrome (NWS). Manifestations of NWS include irritability, hyperactivity,
abnormal sleep pattern, high-pitched cry, tremor, vomiting, diarrhea, weight
loss, and failure to gain weight. The onset, duration, and severity of the
disorder differ based on such factors as the addictive drug used, time and
amount of mother’s last dose, and rate of elimination of the drug from the
newborn. Approaches to the treatment of this syndrome have included supportive
care and, when indicated, drugs such as paregoric or phenobarbital.
Nursing Mothers
Low levels of morphine sulfate have been detected in human milk.
Withdrawal symptoms can occur in breast-feeding infants when maternal
administration of morphine sulfate is stopped. Because of the potential for
adverse reactions in nursing infants from KADIAN®, a decision should be made
whether to discontinue nursing or discontinue the drug, taking into account the
importance of the drug to the mother.
Pediatric Use
The safety of KADIAN®, both the entire capsule and the pellets
sprinkled on apple sauce, have not been directly investigated in pediatric
patients below the age of 18 years. The range of doses available is not
suitable for the treatment of very young pediatric patients or those who are not
old enough to take capsules safely. The apple sauce sprinkling method is not an
appropriate alternative for these patients.
Geriatric Use
Clinical studies of KADIAN® 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.