Download CSP Rivotril

CSP Rohypnol f.c. 1 mg tablets
4.2
Posology and method of administration (CDS 2.2)
Rohpynol tablets are only for use in adults.
Standard dosage
The recommended dosage for adult patients is 0.5-1 mg/day. In exceptional circumstances the
dose may be increased to 2 mg.
Treatment should be started with the lowest recommended dose. The maximum dose should not
be exceeded. The product should be taken just before going to bed.
Duration of treatment
Treatment should be as short as possible. Generally, the duration of treatment varies from a few
days to 2 weeks, with a maximum of 4 weeks, including a tapering-off process.
In certain cases, extension beyond the maximum treatment period may be necessary; if so, it
should not take place without a re-evaluation of the patient's status.
It may be useful to inform the patient when treatment is started that it will be of limited duration
and to explain precisely how the dosage will be progressively decreased.
Moreover, it is important that the patient be made aware of the possibility of rebound phenomena,
thereby minimizing anxiety over such symptoms should they occur while the medicinal product
is being discontinued. There are indications that, in the case of benzodiazepines with a short
duration of action, withdrawal phenomena can become manifest within the dosage interval,
especially when the dosage is high (see 4.4).
Elderly
Elderly patients should receive half of the recommended adult dose.
Patients with hepatic impairment
Patients with impaired liver function should receive a reduced dose.
Patients with respiratory insufficiency
Patients with chronic respiratory insufficiency should receive a reduced dose (see 4.4).
4.3
Contraindications (CDS 2.3)
- Myasthenia gravis
- Use of this drug in patients with known hypersensitivity to benzodiazepines or to any of the
components of the product
- Severe respiratory insufficiency
- Sleep apnea syndrome
- Children
- Severe hepatic insufficiency
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4.4
Special warnings and precautions for use (CDS 2.4.1, 2.4.2)
Benzodiazepines are not recommended for the primary treatment of psychotic illness.
Concomitant use of alcohol / CNS depressants
The concomitant use of Rohypnol with alcohol or/and CNS depressants should be avoided. Such
concomitant use has the potential to increase the clinical effects of Rohypnol possibly including
severe sedation, clinically relevant respiratory and/or cardio-vascular depression (see 4.5).
Medical history of alcohol or drug abuse
Rohypnol should be used with extreme caution in patients with a history of alcohol or drug abuse
(see 4.5).
Hypersensitivity
Hypersensitivity reactions such as rash, angioedema or hypotension may occur in susceptible
individuals.
Tolerance
Some loss of efficacy to the hypnotic effects of benzodiazepines may develop after repeated use
for a few weeks.
Rebound insomnia
A transient syndrome whereby the symptoms that led to treatment with a benzodiazepine or
benzodiazepine-like agent recur in an enhanced form, rebound insomnia may occur on
withdrawal of hypnotic treatment. It may be accompanied by other reactions, including mood
changes, anxiety and restlessness.
Since the risk of withdrawal and rebound phenomena is greater after abrupt discontinuation of
treatment, it is recommended that the dosage be decreased gradually.
Amnesia
Benzodiazepines may induce anterograde amnesia. The condition most often occurs within the
first few hours after ingesting the product, and therefore, to reduce the risk, patients should
ensure that they will be able to sleep undisturbed for 7-8 hours (see 4.8).
Psychiatric and ‘paradoxical’ reactions
Paradoxical reactions such as restlessness, agitation, irritability, aggressiveness, delusion, rages,
nightmares, hallucinations, psychoses, inappropriate behaviour and other adverse behavioural
effects are known to occur with benzodiazepines. Should this occur, the use of the drug should be
discontinued. This reaction may be quite severe with this product and are more likely to occur in
the elderly.
Lactose intolerance
Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or
glucose-galactose malabsorption should not take this medicine.
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Drug abuse and dependence
Dependence
The chronic use of benzodiazepines and benzodiazepine-like agents even in therapeutic doses
may lead to the development of physical and psychic dependence on these products (see 4.8). The
risk of dependence increases with dose and duration of treatment. The risk is also higher in
patients with a medical history of alcohol and/or drug abuse.
To minimise the risk of dependence, benzodiazepines should be prescribed only after careful
evaluation of the indication and for a time as short as possible. The need for further treatment
should be evaluated properly.
Withdrawal
Once physical dependence has developed, abrupt termination of treatment will be accompanied
by withdrawal and rebound symptoms. These may consist of headache, muscle pain, extreme
anxiety, tension, restlessness, confusion, irritability and rebound insomnia.
In severe cases the following symptoms may occur: derealisation, depersonalization, hyperacusis,
numbness and tingling of the extremities, hypersensitivity to light, noise and physical contact,
hallucinations or epileptic seizures.
Use in special populations
Impaired hepatic function
Caution is recommended when treating patients with impaired hepatic function.
Impaired respiratory function
A lower dose is recommended for patients with chronic respiratory insufficiency, due to the risk
of respiratory depression.
Elderly
Benzodiazepines should be used with caution in the elderly, due to the risk of sedation and/or
muscle relaxant effect that may lead to falls, with consequences often serious in this population.
In elderly patients with organic cerebral changes and in debilitated patients the dose should be
chosen with caution because of their increased sensitivity to drugs.
4.5
Interaction with other medicinal products and other forms of interaction (CDS 2.4.5)
Combination with CNS depressants may lead to enhancement of the central depressive effect
(antipsychotics, neuroleptics, hypnotics, anxiolytics/sedatives, antidepressant agents, narcotic
analgesics, antiepileptic drugs, anesthetics and sedative antihistamines).
Enhanced effects on sedation, respiration and hemodynamic may occur when Rohypnol is coadministered with any centrally acting depressants including alcohol.
Alcohol should be avoided in patients receiving Rohypnol (see 4.4).
See section 4.9 Overdose for warnings of other central nervous system depressants, including
alcohol.
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In the case of narcotic analgesics, enhancement of euphoria may also occur, leading to an
increase in psychic drug dependence.
Compounds which inhibit certain hepatic enzymes (particularly cytochrome P450) may enhance
the activity of benzodiazepines and benzodiazepine-like agents. A possible interaction with
potent CYP3A4 inhibitors (including, but not limited to, those listed below) cannot be excluded.
Azolantimycotics: Fluconazole, Ketoconazole, Itraconazole
Cimetidine
HIV-Protease Inhibitors
Gemfibrozil (PPAR-α-Agonist)
Macrolide antibiotics: Erythromycin, Clarithromycin, Telithromycin
Nefazodone (SNRI)
Statins
Verapamil (Ca2+-Antagonist)
Grapefruit juice
Rohypnol may be given in conjunction with oral antidiabetic agents and anticoagulants.
4.6
Pregnancy and lactation (CDS 2.5.1, 2.5.2)
Pregnancy
Insufficient data are available on flunitrazepam to assess its safety during pregnancy.
If the product is prescribed to a woman of childbearing potential, she should be advised to contact
her physician regarding discontinuance of the product if she intends to become pregnant or
suspects that she is pregnant. Although the placental transfer of flunitrazepam is small after a
single dose, prolonged administration should be avoided in the last trimester of pregnancy. If, for
compelling medical reasons, flunitrazepam is administered during the late phase of pregnancy or
during labour, effects on the neonate such as hypothermia, hypotonia and moderate respiratory
depression can be expected due to the pharmacological action of the product.
Moreover, infants born to mothers who took benzodiazepines chronically during the latter stages
of pregnancy may have developed physical dependence and may be at some risk of developing
withdrawal symptoms in the postnatal period (see 4.4).
Nursing mothers
Since benzodiazepines pass into breast milk, flunitrazepam should not be administered to breast
feeding mothers.
4.7
Effects on ability to drive and use machines (CDS 2.4.3)
Sedation (see 4.5), amnesia, impaired concentration and impaired muscular function may
adversely affect the ability to drive or operate machinery. Insufficient sleep may increase the
likelihood of impaired alertness.
Patients should also be warned against drinking alcohol beverages while under the influence of
the drug because of a mutual potentiating of undesirable effects.
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4.8
Undesirable effects (CDS 2.6)
Most of the side effects occur predominantly at the start of the treatment and usually disappear
with prolonged administration.
Frequency categories are as follows:
Very common: 1/10;
Common 1/100 to <1/10;
Uncommon 1/1,000 to <1/100
Rare (1/10,000 to <1/1,000)
Very rare (<1/10,000)
Not known (cannot be estimated from the available data
Immune System Disorders
frequency not known
Hypersensitivity reactions, including rash,
angioedema and hypotension.
Psychiatric Disorders
frequency not known
Confusional state, emotional disorder, libido
disorders.
Pre-existing depression may be unmasked.
Paradoxical reactions such as restlessness,
agitation, irritability, aggression, delusion,
anger, nightmares hallucinations, psychosis,
inappropriate behavior and other adverse
behavioral effects.
Physical dependence: abrupt discontinuation of
the therapy may result in withdrawal or
rebound phenomena (see 4.4).
Abuse.
Nervous System Disorders
frequency not known
Drowsiness during the day, headache,
dizziness,
decreased
alertness,
ataxia.
Anterograde amnesia may occur with
therapeutic doses, the risk increasing at higher
dosages. Amnesic effects may be associated
with inappropriate behaviour (see 4.4).
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Cardiac Disorders
frequency not known
Cardiac failure, cardiac arrest.
Respiratory Disorders
frequency not known
Respiratory depression.
Eye Disorders
frequency not known
Diplopia.
Gastrointestinal Disorders
frequency not known
Gastrointestinal disorders.
Skin and Subcutaneous Tissue Disorders
frequency not known
Skin reactions.
Musculoskeletal and Connective Tissue
Disorders
frequency not known
Muscle weakness.
General Disorders and Administration Site
Conditions
frequency not known
Fatigue.
Injury, Poisoning and Procedural
Complications
frequency not known
4.9
Falls, fractures.
Overdose (CDS 2.7)
Symptoms
Benzodiazepines commonly cause drowsiness, ataxia, dysarthria and nystagmus.
Overdose of Rohypnol is seldom life-threatening if the drug is taken alone, but may lead to
areflexia, apnea, hypotension, cardio respiratory depression and coma. Coma, if it occurs, usually
lasts a few hours but it may be more protracted and cyclical, particularly in elderly patients.
Benzodiazepine respiratory depressant effects are more serious in patients with respiratory
disease.
Benzodiazepines increase the effects of other central nervous system depressants, including
alcohol.
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Treatment
The patient’s vital signs should be monitored and supportive measures instituted as indicated by
the patient’s clinical state In particular, patients may require symptomatic treatment for cardio
respiratory effects or central nervous system effects
Further absorption should be prevented using an appropriate method e.g. treatment within 1-2
hours with activated charcoal. If activated charcoal is used airway protection is imperative for
drowsy patients. In case of mixed ingestion gastric lavage may be considered, however not as a
routine measure.
If CNS depression is severe the use of flumazenil (Anexate®), a benzodiazepine antagonist,
should be considered. This should only be administered under closely monitored conditions. It
has a short half-life (about an hour), therefore patients administered flumazenil will require
monitoring after its effects have worn off. Flumazenil is to be used with extreme caution in the
presence of drugs that reduce seizure threshold (e.g. tricyclic antidepressants). Refer to the
prescribing information for flumazenil (Anexate®), for further information on the correct use of
this drug.
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