・This medicine contracts excessively dilated intracranial/extracranial blood vessels under migraine attack and puts them back to normal. It also reduces inflammation around the vessels by suppressing the release of the substance which causes inflammation.
・It is usually used to treat migraine attacks and not used to prevent attacks.
Dosing schedule (How to take this medicine)
・In general, for adults, take 1 tablet (2.5 mg of naratriptan) at a time when migraine attack occurs. If the effect is insufficient, take an additional dose at an interval of 4 or more hours. The maximum daily dose is 2 tablets (5 mg). If you have liver or renal disease, the maximum daily dose is 1 tablet (2.5 mg). Strictly follow the instructions.
Before using this medicine, be sure to tell your doctor and pharmacist
・If you have previously experienced any allergic reactions (itch, rash, etc.) to any medicines or foods.
・If you have: heart disease, peripheral vascular disorder, hypertension, liver disease, renal disease or organic brain disease such as epilepsy.
・If you have had: heart disease or cerebrovascular disorder.
・If you have: familial or sporadic hemiplegic migraine, basilar migraine or ophthalmoplegic migraine.
・If you are pregnant or breastfeeding.
・If you are taking any other medicinal products. (Some medicines may interact to enhance or diminish medicinal effects. Beware of over-the-counter medicines and dietary supplements as well as other prescription medicines.)
Precautions while taking this medicine
・After using this medicine, although extremely rare, serious heart problems may occur even in those without cardiovascular disease. If you notice abnormalities, contact your doctor immediately.
・Sleepiness may occur when you have a headache or after the use of this medicine,
・Avoid operating dangerous machinery, such as driving a car while taking this medicine.
・Triptans, including this medicine, may worsen headaches. If your headache does not get better after using this medicine, consult with your doctor.
・For healthcare professional use only
Storage conditions and other information
・Keep out of reach of children. Store at room temperature (1 to 30 degrees Celsius), away from direct sunlight and moisture.
・Discard the remainder. Do not store them. If you do not know how to discard, seek advice of your pharmacy or medical institution. Do not give the unused medicines to others.
・This medicine is provided in complicated packaging to prevent infants/children from accidental swallowing. Open the package in consultation with your doctor or pharmacist.