AMANTADINE HYDROCHLORIDE Tablets 50mg "SAWAI" [Generic SYMMETREL]

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Please read "Drug Information" before purchase.

Product Overview

Amantadine Hydrochloride Tablets 50mg (Sawai Generic of Symmetrel) is a Japanese-manufactured medication widely used for treating Parkinson’s disease, drug-induced parkinsonism, and for the prevention and treatment of influenza type A. This high-quality generic contains the same active ingredient as the brand-name Symmetrel, offering equivalent efficacy for managing neurological symptoms and combating influenza infections.

In Parkinson’s disease and parkinsonism, amantadine helps improve movement and control symptoms such as tremors and muscle stiffness by increasing dopamine activity in the brain. For influenza A, it acts as an antiviral agent that prevents the virus from multiplying, thereby reducing the severity and duration of flu symptoms. Manufactured by Sawai Pharmaceutical in Japan under strict quality standards, this medication provides a reliable and effective treatment option trusted by healthcare providers.

Dosage Guidelines

Always take Amantadine 50mg exactly as prescribed by your doctor. Do not adjust your dosage without medical advice. Below are general dosage guidelines for adults (for reference only – follow your physician’s instructions):

• Parkinson’s Disease / Parkinsonism: A typical starting dose is 100 mg per day (two 50mg tablets), taken once daily or divided into two doses. After about one week, the dose may be increased to 200 mg per day (e.g., one 50mg tablet in the morning and one in the evening, or two tablets twice daily) if needed. Do not exceed 300 mg per day (usually given as 100 mg three times daily) and only do so under medical supervision.
• Influenza A (Treatment & Prevention): The typical adult dose is 100 mg per day. This can be taken as one 50mg tablet twice daily or two tablets once daily. For treating flu, start as soon as possible, ideally within 24–48 hours of symptom onset, and continue for about 5 to 7 days. For preventing flu during an outbreak, take 100 mg daily as directed by your doctor for the recommended duration.

If you are elderly or have kidney issues, your doctor may prescribe a lower dose to reduce the risk of side effects. Take each dose at the same times each day to maintain steady levels. Amantadine can be taken with or without food, but taking it with a glass of water is recommended. Do not crush or chew the tablets; swallow them whole. If you need to stop taking Amantadine (especially for Parkinson’s treatment), consult your doctor on how to safely taper off, as stopping suddenly may worsen symptoms.

Possible Side Effects

Like all medications, Amantadine may cause side effects in some users. Most side effects are mild and temporary, but it’s important to be aware of them. Common side effects include:

• Dizziness or lightheadedness
• Nausea or loss of appetite
• Insomnia (difficulty sleeping)
• Dry mouth
• Headache
• Constipation

Not everyone experiences these side effects, and they often improve as your body adjusts to the medication. If any of these side effects persist or become bothersome, inform your doctor. Rarely, more serious side effects can occur, such as confusion, hallucinations, mood changes (e.g., depression), swelling of the ankles or legs, shortness of breath, or difficulty urinating. If you experience any severe or concerning symptoms, stop taking the medication and seek medical attention promptly. Always use this medication under the supervision of a healthcare professional.

FAQ （よくある質問）

Q: What should I do if I miss a dose?
A: If you forget to take a dose, take it as soon as you remember unless it is almost time for your next dose. If it is near the time of the next dose, skip the missed dose and resume your regular dosing schedule. Do not take an extra dose to make up for the missed one. If you miss multiple doses or are unsure what to do, consult your doctor for advice.

Q: Is this Amantadine the same as Symmetrel?
A: Yes. This product contains the exact same active ingredient (amantadine hydrochloride) at the same 50mg strength as Symmetrel. The only difference is that it is made by a Japanese company (Sawai Pharmaceutical) as a generic version. It delivers the same benefits for Parkinson’s symptoms and influenza A as the brand-name Symmetrel. You can expect the same efficacy and safety profile. The tablets may have a different appearance or branding, but rest assured they have passed strict quality controls in Japan.

Q: How should I store this medication?
A: Store Amantadine tablets at room temperature, away from excessive heat, moisture, and direct sunlight. Keep the tablets in their original blister packs until you are ready to use them, to protect them from moisture. Do not store in the bathroom or any damp area. Make sure to keep this and all medications out of reach of children and pets. Also, check the expiration date on the package and do not use the medicine past that date.