Amantadine is an antiviral medicine that chokes the actions of viruses in an individual’s body.

This medication is basically used to treat or prevent influenza A in adults and children. Though, this medication is not effective in flu season as the viruses get resistant to amantadine.

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The health and medical information provided here is for general purposes only and is not a substitute for the expertise and judgment of your physician, or other health care professional. It should not be understood to indicate that the use of this medicine is safe, appropriate or effective for you. Always consult your health care professional before using this, or any other, drug.

You should not use generic amantadine 100mg tablets if you have been vaccinated with a nasal flu vaccine in the past 14 days.

It is not recommended to get the nasal flu vaccine while you are on this medication or for at least 48 hours after your last dose.

Seek emergency medical help if you witness any signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

extreme drowsiness, falling asleep suddenly even after feeling alert;

a light-headed feeling, like you might pass out;

shortness of breath (even with mild exertion), swelling in your hands or feet;

painful or difficult urination;

depression, agitation, aggression, behavior changes, hallucinations, thoughts of hurting yourself;

a seizure; or

severe nervous system reaction--very stiff (rigid) muscles, high fever, sweating, confusion, fast or uneven heartbeats, tremors.

You may have increased sexual urges, unusual urges to gamble, or other intense urges while taking this medicine. Talk with your doctor if this occurs.

Side effects may be more likely in older adults.

Common side effects may include:

dizziness, falls;

dry mouth;

swelling in your legs or feet;

nausea, constipation; or

sleep problems (insomnia).

Take amantadine as prescribed by your doctor. Do not take this medication for a prolonged period of time or in smaller or larger amounts.

If you start taking this medicine to treat influenza A, start taking the medicine within 24 to 48 hours after the manifestations of the flu have begun. Take this medication for as long as prescribed to you even after your symptoms have improved but infection isn’t completely clear.

You need to take this medication at bedtime, with or without food as per your doctor has prescribed you to.

Swallow the capsule whole and do not crush, chew or break it.

Call your doctor if your symptoms have not improved or if you have fever with headache, cough, skin rash or other new symptoms.

If you are taking amantadine for Parkinson symptoms, do not stop using it as it can worsen your conditions. Stopping it suddenly can cause some nasty withdrawal symptoms.

Store at room temperature and away from heat, light and moisture.