Active Ingredient

Amantadine

Amantadine is a medication primarily used for treating certain viral infections and Parkinson’s disease symptoms. It helps in managing conditions by impacting specific brain chemicals and viruses.

This drug is often prescribed to adults dealing with influenza infections or movement disorders.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Amantadine Brands

Amantadine

Strengths 50 mg, 100mg

Symmetrel

Strengths 100mg

Amantadine Uses

Amantadine is used in various medical conditions. Here are some common uses:

Treatment of Parkinson’s disease symptoms
Management of drug-induced movement disorders
Prevention and treatment of influenza A virus infections
Improvement of fatigue in multiple sclerosis

How Amantadine Works

Amantadine works by influencing the release and reuptake of dopamine, a neurotransmitter in the brain, which helps improve movement disorders.

It also prevents the spread of the influenza A virus by inhibiting viral replication in the body.

This dual action makes it effective in both neurological and viral conditions.

Common side effects of Amantadine

Not everyone experiences side effects from Amantadine, and many are mild and temporary. Common side effects include:

Dizziness
Insomnia
Nausea
Dry mouth
Constipation
Loss of appetite
Blurred vision

If you experience serious or persistent symptoms, contact your doctor.

Frequently Asked Questions

What conditions does Amantadine treat?

Amantadine is used for Parkinson’s disease symptoms, influenza A prevention and treatment, and managing certain movement disorders.

How long does it take for Amantadine to work?

The effects of Amantadine may vary, but some patients notice improvements in symptoms within a few days.

Can I take Amantadine with other medications?

Inform your doctor about all medications you are taking to avoid potential interactions.

Is it safe to consume alcohol while on Amantadine?

It is advisable to avoid alcohol as it can increase the risk of side effects like dizziness.

What should I do if I miss a dose of Amantadine?

If you miss a dose, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose.