Amantadine Oral - Symmetrel- Drugs Information, Side Effects, & Interactions

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Amantadine (a-MAN-ta-deen)

Treats or prevents the flu (influenza type-A). Also treats Parkinson's disease and Parkinson-like symptoms caused by certain medicines.

Symmetrel
There may be other brand names for this medicine.

You should not use this medicine if you have ever had an allergic reaction to amantadine.

Liquid Filled Capsule, Liquid, Tablet

Your doctor will tell you how much of this medicine to use and how often. Do not use more medicine or use it more often than your doctor tells you to.
To treat or prevent infection with the flu, keep using this medicine for the full treatment time.
Measure the oral liquid medicine with a marked measuring spoon or medicine cup.

If a dose is missed:

If you miss a dose or forget to use your medicine, use it as soon as you can. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose.
Do not use extra medicine to make up for a missed dose.

Store the medicine at room temperature, away from heat, moisture, and direct light. Do not freeze.
Keep all medicine away from children and never share your medicine with anyone.

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Make sure your doctor knows if you are taking thioridazine (Mellaril®), triamterene/HCTZ (Dyazide®), sulfamethoxazole/trimethoprim (Bactrim®, Septra®), quinine or quinidine (Quinadex®, Quinaglute®), diet pills, or medicine to treat stomach disorders, urinary problems (incontinence), diarrhea, or mental disorders.
Do not drink alcohol while you are using this medicine.

Make sure your doctor knows if you are pregnant or breastfeeding, or if you have glaucoma, heart disease, kidney disease, liver disease, low blood pressure, swelling or water retention, epilepsy, or a history of seizures.
Do not stop using this medicine suddenly without asking your doctor. You may need to slowly decrease your dose before stopping it completely.
This medicine may make you dizzy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.

Call your doctor right away if you notice any of these side effects:

Fever, fast heartbeat, mood changes, uncontrolled muscle movements, rapid breathing
Lightheadedness or fainting
Problems with urination
Slow or irregular heartbeat
Swelling in the hands, ankles, or feet
Unusual thoughts or behavior, thoughts of hurting yourself

If you notice these less serious side effects, talk with your doctor:

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