Take amantadine exactly as prescribed by your doctor. Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose.
If you take amantadine to treat influenza A, start taking the medicine within 24 to 48 hours after flu symptoms begin. Keep taking this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared.
You may take amantadine with or without food. You may need to take this medicine only at bedtime. Follow your doctor's instructions.
Measure liquid oral solution carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).
Swallow the capsule or tablet whole and do not crush, chew, or break it.
If you cannot swallow a capsule whole, open it and sprinkle the medicine into a spoonful of applesauce. Swallow the mixture right away without chewing. Do not save it for later use.
Call your doctor if your symptoms do not improve, or if you have a fever with a headache, cough, skin rash, or other new symptoms.
If you take amantadine for Parkinson symptoms: You should not stop using amantadine suddenly or your condition may become worse. Stopping suddenly may also cause unpleasant withdrawal symptoms. Ask your doctor how to safely stop using this medicine.
Store at room temperature away from moisture, heat, and light. Keep the bottle tightly closed when not in use.
 Detailed Amantadine dosage information
What happens if I miss a dose?
Skip the missed dose and use your next dose at the regular time. Do not use two doses at one time.
Call your doctor if you miss several doses in a row.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of amantadine can be fatal.
Overdose symptoms may include confusion, agitation, behavior changes, hallucinations, severe headache or pounding in your ears, muscle stiffness, problems with balance or walking, trouble breathing, fast heartbeats, or seizure.
