Temporary eradication of acute attacks of migraine with or without aura.
Composition:
1 tabl contains 50 mg or 100 mg Sumatriptan in the form of succinate. Table. contain lactose.
Action:
Antimigraine drug - a selective agonist of 5-HT serotonin receptors1D. It does not affect other receptor subtypes (5-HT2 up to 5-HT7). The drug selectively narrows the blood vessels in the area of blood circulation of the carotid artery, not affecting the cerebral flow. In addition, the results of experimental studies suggest that it inhibits trigeminal nerve activity. Both mechanisms underlie the anti-migraine effect of sumatriptan. The effect of the drug begins after 30 minutes after administration. After oral administration the drug is rapidly absorbed, 70% of the maximum plasma concentration occurs after 45 min. The average bioavailability of sumatriptan in the oral form is 14%. The degree of binding to plasma proteins is small (14-21%). It is metabolized mainly by monoamine oxidase A. The major transformation product - an indole acetic acid analogue is excreted in the urine, where it occurs in the form of free acid and glucuronides. Its action was not found on 5-HT receptors1 and 5-HT2. Non-renal excretion accounts for about 80% of total clearance. T0,5 in the blood is about 2 hours. The pharmacokinetics of sumatriptan after oral administration is not significantly impaired by migraine attacks.
Contraindications:
Hypersensitivity to sumatriptan or any of the excipients. A history of myocardial infarction, ischemic heart disease, Prinzmetal angina, peripheral vascular disease or ischemic heart disease, moderate and severe symptoms, and mild uncontrolled hypertension. Patients after a stroke, brain or transient cerebral ischemic attack. Severe liver dysfunction. Simultaneous use with preparations containing ergotamine or its derivatives (including methy allergen) or any drug from the group of triptans or other 5-HT receptor agonists1. Co-administration with MAO inhibitors and 2 weeks from discontinuation.
Precautions:
The preparation is not indicated for patients with hemiplegic migraine, basal or periportal migraine. In patients with previously diagnosed migraine, but with an unusual picture of a given headache and migraine-type headache, patients who have not previously been diagnosed with migraine should take measures to exclude potential other causes of the disorder (eg stroke or transient cerebral ischemic attack) ). Caution should be exercised in patients with mild controlled hypertension due to possible transient increases in blood pressure and peripheral vascular resistance. After administration of Sumatriptan, transient pain and tightness in the chest and throat may occur, sometimes severely; if these symptoms point to ischemic heart disease, the drug should be discontinued and appropriate diagnostic tests should be performed. The drug should be used with caution in patients who may be expected to change in absorption, metabolism or excretion of the drug, eg in hepatic impairment (Child-Pugh grade A or B) or kidney function. Special care should be taken in patients who have had seizures or risk factors lowering the seizure threshold and in patients with hypersensitivity to sulphonamides. The abuse of painkillers in the treatment of headache may be related to its severity (headache dependent on drug abuse - MOH), in these patients may need to stop treatment. In patients at risk for cardiovascular disease (heavy smokers, nicotine replacement therapy, postmenopausal women and men over 40 years of age), sumatriptan should only be used after appropriate testing. The product contains lactose - should not be used in patients with rare hereditary galactose intolerance, Lapp lactase deficiency or malabsorption of glucose-galactose.
Pregnancy and lactation:
It can only be used during pregnancy if the benefit to the mother outweighs the potential risk to the fetus.Sumatriptan is excreted in milk - breastfeeding should be avoided within 12 hours of admission.
Side effects:
Common: dizziness, drowsiness, sensory disturbances (including paraesthesia and hypoaesthesia), transient increase in blood pressure soon after administration, sudden redness (especially of the face), shortness of breath, nausea and vomiting (the association with sumatriptan is not clear), pain , feeling hot or cold, heaviness, tension or pressure (these symptoms are usually transient, can be strong and occur in various parts of the body, including the chest and throat), feeling weak, tired, and aching muscles. Very rare: slight changes in liver function values. Not known: symptoms of hypersensitivity (from skin changes to anaphylactic shock), seizures (in patients with a history of seizures or co-existing factors that predispose to their occurrence, as well as in people without risk factors), tremor, dystonia, nystagmus, scotoma, flicker of light , double vision, changes in the field of vision, loss of vision, including permanent vision loss (visual disturbances may be a component of a migraine attack), bradycardia, tachycardia, palpitations, arrhythmia, transient ischemic changes in the ECG, coronary spasm, angina chest pain, myocardial infarction, hypotension, Raynaud's syndrome, ischemic colitis, diarrhea, stiff neck, joint pain, anxiety, excessive sweating.
Dosage:
Orally. Adults aged 18-65: a single dose of 50 mg, some patients may require a dose of 100 mg. The drug should be taken as soon as possible after the first symptoms of migraine, however, the drug given at any stage of the migraine attack is equally effective. If the symptoms of a migraine attack do not improve after the first dose, it is not advisable to take a second dose during the same seizure; then treatment with acetaminophen, Acetylsalicylic acid or other NSAIDs may be used. The drug can be used during subsequent seizures. In case of recurrence of symptoms, the Next dose can be taken, but not earlier than 2 hours after the first dose. The maximum daily dose can not exceed 300 mg. Do not use prophylactic or a dose greater than the recommended dose.Special groups of patients. It is not recommended for use in children and adolescents below 18 years of age and over 65 years due to the lack of data on safety and efficacy.Way of giving. The tablets should be swallowed whole with water.