Brand name :Symmetrel Tablets 100mg
Active ingredient: Amantadine hydrochloride
Effects of this medicine
This medicine acts on neurotransmitter such as dopamine or serotonin in the brain, and improves decreased willingness and spontaneity as sequelae of cerebral infarction. It also relieves the symptoms of Parkinson's syndrome (tremor of limbs, etc.) by enhancing the activity of dopaminergic neurons in the brain. And it inhibits invading process of type A influenza virus into human cell, and prevents viral multiplication.
It is usually used for improvement of decreased willingness and spontaneity resulting from sequelae of cerebral infarction, and to treat Parkinson's syndrome and influenza A infection.
For treatment of sequelae of cerebral infarction: In general, for adults, take 100 to 150 mg of the active ingredient a day in 2 to 3 divided doses. The dosage should be adjusted according to the age or symptoms. The preparation contains 100mg of the active ingredient in a tablet.
For treatment of Parkinson's syndrome: In general, for adult, initially take 1 tablet (100 mg of the active ingredient) at a time, once a day. One week later, as a maintenance dose, take 1 tablet (100 mg) at a time, twice a day (200 mg). The dosage should be adjusted according to the age or symptoms. However, daily dose should not exceed 1 tablet (100 mg) at a time, 3 times a day (300 mg).
For treatment of influenza A infection: In general, for adults, take 1 tablet (100 mg of the active ingredient) at a time, once a day. The dosage should be adjusted according to the age or symptoms. However, in elderly or patients with renal disorder, the daily dose should not exceed 1 tablet (100 mg).
In any case, strictly follow the instructions.
If you miss a dose, take a dose as soon as possible. However, if it is near the next dose (8 hours or less if your dosing schedule is once a day, 5 hours or less if your dosing schedule is twice a day), skip the missed dose and continue your regular dosing schedule. You should never take two doses at one time.
If you accidentally take more than your prescribed dose, consult with your doctor or pharmacist.
Do not stop taking this medicine unless your doctor instructs you to do so. Sudden withdrawal may cause exacerbations of Parkinson's disease or high fever, etc.
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