Amantadine: What It Is, How It Works, and When to Use It

Amantadine started as a flu medicine, but doctors now mainly give it for Parkinson’s disease and certain movement disorders. It can also help with drug‑induced tremors and sometimes with fatigue after multiple sclerosis. If you’ve been prescribed it, it’s usually because it blocks a specific viral protein and boosts dopamine in the brain.

Key uses of amantadine

For most people the drug is used to treat mild to moderate Parkinson’s symptoms, especially stiffness and tremor. Some neurologists add it to other Parkinson’s meds to smooth out the response. In rare cases it’s still used for influenza A, but newer antivirals have taken over that role.

Dosage guidelines and safety tips

Adults usually start with 100 mg once a day. Some doctors split the dose into 50 mg‑twice‑daily to cut down stomach upset. For Parkinson’s, the dose may climb to 200 mg a day, but never jump higher without a doctor’s OK. Take the pill with food if it feels harsh on your stomach.

Common side effects are mild: dry mouth, constipation, trouble sleeping, or a light headache. Serious reactions—like swelling of the face, rash, or fast heartbeat—need a call to your doctor right away. If you notice mood changes or hallucinations, that’s another warning sign.

When you’re buying amantadine online, check that the pharmacy is licensed in Canada or your country. Look for a physical address, a real pharmacy license number, and a secure https connection. Avoid sites that push “cheap” versions with no prescription requirement; they often sell counterfeit pills.

Store the tablets at room temperature, away from moisture. If you miss a dose, take it as soon as you remember unless it’s almost time for the next one—don’t double up.

Pregnant or nursing women should only use amantadine if the benefits outweigh the risks. Talk to your healthcare provider about any other meds you’re on, especially anticholinergics or other Parkinson’s drugs, because interactions can happen.

Doctors often check kidney function before starting amantadine because the drug leaves the body through the kidneys. If your labs show reduced kidney work, the dose may be lowered or the medicine stopped.

Amantadine can raise the level of certain antidepressants and antipsychotics, so let your pharmacist know every medication you’re taking. Alcohol can worsen dizziness, so drink lightly if you choose.

Bottom line: amantadine works well for certain viruses and Parkinson’s symptoms when taken as directed. Keep an eye on side effects, follow the dosing schedule, and buy only from reputable online pharmacies.