Zolmitriptan 5 Mg Orodispersible Tablets
Out of date information, search anotherSUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Zolmitriptan 5 mg Orodispersible Tablets
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
Zolmitriptan
Each 5 mg orodispersible tablet contains 5 mg of zolmitriptan.
For a full list of excipients, see 6.1.
3 PHARMACEUTICAL FORM
Orodispersible tablet
White, round, flat tablets with a diameter of 8.0 mm approximately.
CLINICAL PARTICULARS
4
4.1 Therapeutic indications
Acute treatment of migraine headache with or without aura.
4.2 Posology and method of administration
The recommended dose of Zolmitriptan Orodispersible Tablets to treat a migraine attack is 2.5 mg. It is advisable that Zolmitriptan Orodispersible Tablets is taken as early as possible after the onset of migraine headache but it is also effective if taken at a later stage.
The tablet need not be taken with liquid; the tablet dissolves on the tongue and is swallowed with saliva. This formulation can be used in situations in which liquids are not available, or to avoid the nausea and vomiting that may accompany the ingestion of tablets with liquids. However, a delay in the absorption of zolmitriptan from Zolmitriptan Orodispersible Tablets can occur which may delay onset of action.
The blister pack should be peeled open as shown on the foil (tablets should not be pushed through the foil). The Zolmitriptan tablet should be placed on the tongue, where it will dissolve and be swallowed with the saliva.
If symptoms of migraine should recur within 24 hours, following an initial response, a second dose may be taken. If a second dose is required, it should not be taken within 2 hours of the initial dose. If a patient does not respond to the first dose, it is unlikely that a second dose will be of benefit in the same attack.
If a patient does not achieve satisfactory relief with 2.5 mg doses, for subsequent attacks 5mg doses of Zolmitriptan Orodispersible Tablets could be considered.
The total daily intake should not exceed 10 mg. Not more than 2 doses of Zolmitriptan Orodispersible Tablets should be taken in any 24-hour period.
Zolmitriptan Orodispersible Tablets is not indicated for prophylaxis of migraine.
Use in Children (under 12 years of age)
Safety and efficacy of zolmitriptan tablets in paediatric patients have not been evaluated. Use of Zolmitriptan Orodispersible Tablets in children is therefore not recommended.
Adolescents (12 - 17 years of age)
The efficacy of Zolmitriptan Orodispersible Tablets was not demonstrated in a placebo controlled clinical trial for patients aged 12 to 17 years. Use of Zolmitriptan Orodispersible Tablets in adolescents is therefore not recommended.
Use in Patients Aged Over 65 years
The safety and efficacy of zolmitriptan in individuals aged over 65 years have not been evaluated. Use of Zolmitriptan Orodispersible Tablets in the elderly is therefore not recommended.
Patients with hepatic impairment
Patients with mild or moderate hepatic impairment require no dose adjustment, however for patients with severe hepatic impairment, a maximum dose of 5 mg in 24 hours is recommended.
Patients with Renal Impairment
No dosage adjustment required in patients with a creatinine clearance of more than 15ml/min (see Section 4.3 and Section 5.2).
Interactions requiring dose adjustment (see Section 4.5)
For patients taking MAO-A inhibitors, a maximum dose of 5 mg in 24 hours is recommended. A maximum dose of 5 mg zolmitriptan in 24 hours is recommended in patients taking cimetidine.
A maximum dose of 5 mg zolmitriptan in 24 hours is recommended in patients taking specific inhibitors of CYP 1A2 such as fluvoxamine and the quinolones (eg ciprofloxacin).
4.3 Contraindications
Zolmitriptan Orodispersible Tablets is contraindicated in patients with known hypersensitivity to zolmitriptan or to any of the excipients:
Moderate or severe hypertension and mild uncontrolled hypertension
This class of compounds (5 HT1B/1D receptor agonists), has been associated with coronary vasospasm, as a result, patients with ischaemic heart disease were excluded from clinical trials. Therefore, Zolmitriptan Orodispersible Tablets should not be given to patients who have had myocardial infarction or have ischaemic heart disease, coronary vasospasm (Prinzmetal’s angina), peripheral vascular disease or patients who have symptoms or signs consistent with ischaemic heart disease.
Concurrent administration of ergotamine, ergotamine derivatives (including methysergide), sumatriptan, naratriptan and other 5HTiB/iD receptor agonists with zolmitriptan is contraindicated (see Section 4.5) Zolmitriptan should not be administered to patients with a history of cerebrovascular accident (CVA) or transient ischaemic attack (TIA).
Zolmitriptan is contraindicated in patients with a creatinine clearance of less than 15 ml/min.
4.4 Special warnings and precautions for use
Zolmitriptan should only be used where a clear diagnosis of migraine has been established. As with other acute migraine therapies, before treating headaches in patients not previously diagnosed as migraineurs, and in migraineurs who present with atypical symptoms, care should be taken to exclude other potentially serious neurological conditions. Zolmitriptan is not indicated for use in hemiplegic, basilar or opthalmoplegic migraine. Stroke, and other cerebrovascular events have been reported in patients treated with 5HT1B/1d agonists. Its should be noted that migraineurs may be at risk of certain cerebrovascular events.
Zolmitriptan should not be given to patients with symptomatic Wolff-Parkinson-White syndrome or arrhythmias associated with other cardiac accessory conduction pathways.
In very rare cases, as with other 5HT1B/1d agonists, coronary vasospasm, angina pectoris and myocardial infarction have been reported. Zolmitriptan Orodispersible Tablets should not be given to patients with risk factors for ischaemic heart disease (e.g. smoking, hypertension, hyperlipidaemia, diabetes mellitus, heredity) without prior cardiovascular evaluation (see Section 4.3).
Special consideration should be given to postmenopausal women and males over 40 with these risk factors. These evaluations, however, may not identify every patient who has cardiac disease, and in very rare cases, serious cardiac events have occurred in patients without underlying cardiovascular disease.
As with other 5HT1B/1D receptor agonists, heaviness, pressure or tightness over the precordium (see Section 4.8) have been reported after the administration of zolmitriptan. If chest pain or symptoms consistent with ischaemic heart disease occur, no further doses of zolmitriptan should be taken until after appropriate medical evaluation has been carried out.
As with other 5HT1B/1D agonists transient increases in systemic blood pressure have been reported in patients with and without a history of hypertension.
Very rarely these increases in blood pressure have been associated with significant clinical events. The dose recommendation for zolmitriptan should not be exceeded.
Undesirable effects may be more common during concomitant use of triptans and herbal preparations containing St John’s wort (Hypericum perforatum).
Serotonin Syndrome (including altered mental status, autonomic instability and neuromascular abnormalities) has been reported following concomitant treatment with triptans and Selective Serotonin Reuptake Inhibitors (SSRIs) or Serotonin Norepinephrine Reuptake Inhibitors (SNRIs). These reactions can be severe. If concomitant treatment with zolmitriptan and an SSRI or SNRI is clinically warranted, appropriate observation of the patient is advised, particularly during treatment initiation, with dose increases, or with addition of another serotonergic medication (See section 4.5).
Prolonged use of any type of painkiller for headaches can make them worse. If this situation is experienced or suspected, medical advice should be obtained and treatment should be discontinued. The diagnosis of medication overuse headache should be suspected in patients who have frequent or daily headaches despite (or because of) the regular use of headache medications.
4.5 Interaction with other medicinal products and other forms of interaction
Interaction studies were performed with caffeine, ergotamine, dihydroergotamine,
paracetamol, metoclopramide, pizotifen, fluoxetine, rifampicin and propranolol and no clinically relevant differences in the pharmacokinetics of zolmitriptan or its active metabolite were observed.
Data from healthy subjects suggests there are no pharmacokinetic or clinically significant interactions between zolmitriptan and ergotamine. However, the increased risk of coronary vasospasm is a theoretical possibility, and concomitant administration is contraindicated. It is advised to wait at least 24 hours following the use of ergotamine containing preparations before administering zolmitriptan. Conversely it is advised to wait at least six hours following use of zolmitriptan before administering an ergotamine containing product (see section 4.3).
Following administration of moclobemide, a specific MAO-A inhibitor, there was a small increase (26%) in AUC for zolmitriptan and a 3 fold increase in AUC of the active metabolite. Therefore, a maximum intake of 5 mg zolmitriptan in 24 hours, is recommended in patients taking a MAO-A inhibitor. The drugs should not be used together if doses of moclobemide higher than 150 mg b.i.d. are administered.
Following the administration of cimetidine, a general P450 inhibitor, the half life of
zolmitriptan was increased by 44% and the AUC increased by 48%. In addition, the half life and AUC of the active, N-desmethylated, metabolite (183C91) were doubled.A maximum dose of 5 mg zolmitriptan in 24 hours is recommended in patients taking cimetidine. Based on the overall interaction profile, an interaction with specific inhibitors of CYP 1A2 cannot be excluded. Therefore, the same dosage reduction is recommended with compounds of this type, such as fluvoxamine and the quinolones (eg ciprofloxacin).
Selegiline (a MAO-B inhibitor) and fluoxetine (an SSRI) did not result in any pharmacokinetic interaction with zolmitriptan. However, there have been reports describing patients with symptoms compatible with serotonin syndrome (including altered mental status, autonomic instability and neuromuscular abnormalities) following the use of selective serotonin reuptake inhibitors (SSRIs) or serotonin norepinephrine reuptake inhibitors (SNRIs) and triptans (see section 4.4).
As with other 5HTiB/iD receptor agonists, zolmitriptan could delay the absorption of other medicinal products.
Concomitant administration of other 5HTiB/iD agonists within 24 hours of zolmitriptan treatment should be avoided. Similarly, administration of zolmitriptan within 24 hours of the use of other 5HTiB/iD agonists should be avoided.
Pregnancy
The safety of this medical product for use in human pregnancy has not been established. Evaluation of experimental animal studies does not indicate direct teratogenic effects. However, some findings in embryotoxicity studies suggested impaired embryo viability. Administration of zolmitriptan should only be considered if the expected benefit to the mother is greater than any possible risk to the foetus.
Lactation
Studies have shown that zolmitriptan passes into the milk of lactating animals. No data exist for passage of zolmitriptan into human breast milk. Therefore, caution should be exercised when administering zolmitriptan to women who are breast-feeding. Infant exposure should be minimised by avoiding breast feeding for 24 hours after treatment
4.7 Effects on ability to drive and use machines
In a small group of healthy individuals there was no significant impairment of performance of psychomotor tests with doses up to 20 mg zolmitriptan. Caution is recommended in patients performing skilled tasks (eg driving or operating machinery) as drowsiness and other symptoms may occur during a migraine attack.
4.8 Undesirable effects
Possible undesirable effects are typically transient, tend to occur within four hours of dosing, are no more frequent following repeated dosing and resolve spontaneously without additional treatment.
The following definitions apply to the incidence of the undesirable effects:
Very common (>1/ 10); common (>1/ 100 < 1/10); uncommon (>1/ 1.000, < 1/100), rare (>1/ 10000, < 1/1000), very rare (< 1/ 10000).
Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.
The following undesirable effects have been reported following administration of zolmitriptan:
|
System Organ Class |
Frequency |
Undesirable Effect |
|
Immune system disorders |
Rare |
Hypersensitivity reactions including urticaria, angioedema and anaphylactic reactions |
|
Nervous system disorders |
Common |
Abnormalities or disturbances or sensation; Dizziness; Headache; Hyperaesthesia; Paraesthesia; Somnolence; Warm sensation |
|
Cardiac disorders |
Common |
Palpitations |
|
Uncommon |
Tachycardia | |
|
Very rare |
Myocardial infarction; Angina pectoris; Coronary vasospasm | |
|
Vascular disorders |
Uncommon |
Slight increases in blood pressure; Transient increases in systemic blood pressure |
|
Gastrointestinal disorders |
Common |
Abdominal pain; Nausea; Vomiting; Dry mouth |
|
Very rare |
Ischaemia or infarction (e.g. intestinal ischaemia, intestinal infarction, splenic infarction) which may present as bloody diarrhoea or abdominal pain | |
|
Musculoskeletal and connective tissue disorders |
Common |
Muscle weakness; Myalgia |
|
Renal and Urinary disorders |
Uncommon |
Polyuria; Increased urinary frequency |
|
Very rare |
Urinary urgency | |
|
General disorders and administration site disorders |
Common |
Asthenia; Heaviness, tightness, pain or pressure in throat, neck, limbs or |
|
System Organ Class |
Frequency |
Undesirable Effect |
|
chest. |
Certain symptoms may be part of the migraine attack itself.
4.9 Overdose
Volunteers receiving single oral doses of 50 mg commonly experienced sedation.
The elimination half-life of zolmitriptan tablets is 2.5 to 3 hours, (see Section 5.2) and therefore monitoring of patients after overdose with Zolmitriptan Orodispersible Tablets should continue for at least 15 hours or while symptoms or signs persist.
There is no specific antidote to zolmitriptan. In cases of severe intoxication, intensive care procedures are recommended, including establishing and maintaining a patent airway, ensuring adequate oxygenation and ventilation, and monitoring and support of the cardiovascular system.
It is unknown what effect haemodialysis or peritoneal dialysis has on the serum concentrations of zolmitriptan.
5 PHARMACOLOGICAL PROPERTIES
5.1 Pharmacodynamic properties
Pharmacotherapeutic group: Selective serotonin (5HT1) agonists. ATC Code: N02CC03
Zolmitriptan has been demonstrated to be a selective agonist for 5-HTiB/ID receptors
mediating vascular contraction. Zolmitriptan has high affinity for human recombinant 5-HTIB and 5-HTID receptors, and modest affinity for 5-HTIA receptors. Zolmitriptan has no significant affinity or pharmacological activity at other 5-HT receptor subtypes (5-HT2, 5- HT3, 5-HT4) or adrenergic, histaminic, muscarinic or dopaminergic receptors.
In animal models, the administration of zolmitriptan causes vasoconstriction in the carotid arterial circulation. In addition, experimental studies in animals suggest that zolmitriptan inhibits central and peripheral trigeminal nerve activity with inhibition of neuropeptide release (calcitonin gene related peptide (CGRP), vasoactive intestinal peptide (VIP) and Substance P).
In clinical studies with Zolmitriptan Orodispersible Tablets conventional tablets the onset of efficacy is apparent from one hour, with increasing efficacy being noted between 2 and 4 hours on headache and other symptoms of migraine such as nausea, photophobia and phonophobia.
Zolmitriptan when administered as conventional oral tablets is consistently effective in migraine with or without aura and in menstrually associated migraine. Zolmitriptan, when administered as conventional oral tablets, if taken during the aura, has not been demonstrated to prevent the migraine headache and therefore Zolmitriptan Orodispersible Tablets should be taken during the headache phase of migraine.
One controlled clinical trial in 696 adolescents with migraine failed to demonstrate superiority of zolmitriptan tablets at doses of 2.5 mg, 5 mg and 10 mg over placebo. Efficacy was not demonstrated.
5.2 Pharmacokinetic properties
Following oral administration of Zolmitriptan Orodispersible Tablets conventional tablets zolmitriptan is rapidly and well absorbed (at least 64%) after oral administration to man. The mean absolute bioavailability of the parent compound is approximately 40%. There is an active metabolite (the N-desmethyl metabolite) which is also a 5HTiB/iD receptor agonist and is 2 to 6 times as potent, in animal models, as zolmitriptan.
In healthy subjects, when given as a single dose, zolmitriptan and its active metabolite, the N-desmethyl metabolite, display dose-proportional AUC and Cmax over the dose range 2.5 to 50 mg. Absorption of zolmitriptan is rapid In healthy volunteers, 75% of Cmax is achived within 1 hour, and after this the concentration of zolmitriptan in plasma is maintained at approximately this level until 4-5 hours after dosing.
Zolmitriptan absorption is unaffected by the presence of food. There was no evidence of accumulation on multiple dosing of zolmitriptan.
Plasma concentration of zolmitriptan and its metabolites are lower in the first 4 hours after drug administration during a migraine compared with a migraine-free period, suggesting delayed absorption consistent with the reduced rate of gastric emptying observed during a migraine attack.
Zolmitriptan Orodispersible Tablets was demonstrated to be bioequivalent with the conventional tablet in terms of AUC and Cmax for zolmitriptan and its active metabolite 183C91. Clinical pharmacology data show that the tmax for zolmitriptan can be later for the orally dispersible tablet (range 0.6 to 5 h, median 3 h) compared to the conventional tablet (range 0.5 to 3 h, median 1.5 h). The tmax for the active metabolite was similar for both formulations (median 3 h).
Zolmitriptan is eliminated largely by hepatic biotransformation followed by urinary excretion of the metabolites. There are three major metabolites: the indole acetic acid, (the major metabolite in plasma and urine), the N-oxide and N-desmethyl analogues. The N-desmethylated metabolite is active whilst the others are not. Plasma concentrations of the N-desmethylated metabolite are approximately half those of the parent drug, hence it would therefore be expected to contribute to the therapeutic action of Zolmitriptan Orodispersible Tablets. Over 60% of a single oral dose is excreted in the urine (mainly as the indole acetic acid metabolite) and about 30% in faeces mainly as unchanged parent compound.
Following intravenous administration, the mean total plasma clearance is approximately 10 ml/min/kg, of which one quarter is renal clearance. Renal clearance is greater than glomerular filtration rate suggesting renal tubular secretion. The volume of distribution following intravenous administration is 2.4 l/kg. Plasma protein binding of zolmitriptan and the N-desmethyl metabolite is low (approximately 25%). The mean elimination half-life of zolmitriptan is 2.5 to 3 hours. The half-lives of its metabolites are similar, suggesting their elimination is formation-rate limited.
Renal clearance of zolmitriptan and all its metabolites is reduced (7-8 fold) in patients with moderate to severe renal impairment compared to healthy subjects, although the AUC of the parent compound and the active metabolite were only slightly higher (16 and 35% respectively) with a 1 hour increase in half-life to 3 to 3.5 hours. These parameters are within the ranges seen in healthy volunteers.
The metabolism of zolmitriptan is reduced in hepatic impairment in proportion to the extent of the impairment. Zolmitriptan AUC and Cmax were increased by 226% and 50%, respectively and the half life was prolonged to 12 h in subjects with severe liver disease compared to healthy subjects. Exposure to the metabolites, including the active metabolite was reduced.
The pharmacokinetics of zolmitriptan in healthy elderly subjects were similar to those in healthy young volunteers.
5.3 Preclinical safety data
Preclinical effects in single and repeat dose toxicity studies were observed only at exposures well in excess of the maximum human exposure.
The findings from in vitro and in vivo genetic toxicity studies show that genotoxic effects of zolmitriptan are not to be expected under the conditions of clinical use.
No tumours relevant to the clinical use were found in mouse and rat carcinogenicity studies.
As with other 5HT1B/1D receptor agonists, zolmitriptan binds to melanin.
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
Dextrates, Hydrated,
Silicified Microcrystalline Cellulose,
Croscarmellose sodium,
Sucralose,
Orange Flavour (Consisting of Maize maltodextrin, flavouring preparations, flavouring substances, E 307 Alpha-tocopherol, natural flavouring substances) Magnesium Stearate
6.2
Incompatibilities
Not applicable
6.3 Shelf life
24 months
6.4 Special precautions for storage
Do not store above 30°C.
6.5 Nature and contents of container
Orodispersible tablets are provided in peelable aluminium laminate blister packs.
Pack sizes: 2, 3, 6 and 12 tablets Not all pack sizes may be marketed
6.6 Special precautions for disposal
No special requirements
MARKETING AUTHORISATION HOLDER
7
Arrow Generics Limited Whiddon Valley, Barnstaple,
Devon,
EX32 8NS United Kingdom
8 MARKETING AUTHORISATION NUMBER(S)
PL 18909/0439
9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION
14/09/2011
10 DATE OF REVISION OF THE TEXT
18/10/2013