Symmetrel (Amantadine)

Symmetrel (Amantadine) using to treat certain influenza (flu) infections. It is not an effective treatment for colds or other viruses. Symmetrel can also improve muscle control and reduce muscle stiffness in patients with Parkinson's disease or similar movement disorders.

They need to know if you have any of these conditions:
closed-angle glaucoma
depression or other mental illness
eczema
heart or circulation problems
kidney disease
liver disease
low blood pressure
seizures (convulsions)
an unusual or allergic reaction to amantadine, rimantadine, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
breast-feeding

Take amantadine capsules or tablets by mouth. Follow the directions on the prescription label. Swallow whole with a full glass of water. If it upsets your stomach you can take amantadine with food. Take your doses at regular intervals. Do not take your medicine more often than directed. Finish the full course prescribed by your prescriber or health care professional even if you think your condition is better. Do not stop taking except on your prescriber's advice.

Contact your pediatrician or health care professional regarding the use of this medicine in children. Special care may be needed.

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Tell your doctor about all other medicines you are taking, including non-prescription medications, nutritional supplements, or herbal products. Also tell your doctor if you are a frequent user of drinks with caffeine or alcohol, if you smoke, or if you use illegal drugs. These may affect the way your medicine works. Check with your doctor before stopping or starting any of your medicines.

Side effects that you should report to your prescriber or health care professional as soon as possible:
changes in vision
depression or thoughts of suicide
difficulty passing urine
fainting spells or lightheadedness
hallucinations (seeing things that are not really there)
movement difficulties
purplish spots or network on the skin
seizures (convulsions)
swelling of the feet or legs

Side effects that usually do not require medical attention (report to your prescriber or health care professional if they continue or are bothersome):
anxiety, irritability, nervousness
diarrhea or constipation
difficulty sleeping, or nightmares
drowsiness
dry mouth
headache
loss of appetite
nausea or vomiting
unusual tiredness

Let your doctor know if your symptoms do not improve in a few days.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how amantadine affects you. To reduce the risk of dizzy or fainting spells, do not sit or stand up quickly, especially if you are an older patient. Alcohol can make you more drowsy and dizzy, increase confusion and lightheadedness. Avoid alcoholic drinks.

If you are taking amantadine for a movement disorder, do not suddenly stop taking it. You may get muscle stiffness, paralysis, confusion, or find it difficult to pass urine.

If you are taking amantadine for Parkinson's disease, be careful not to overdo physical activity as your condition improves. Gradually increase activity so that your body has time to adjust.

Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water will help. Brush and floss teeth regularly and carefully to avoid problems with the mouth and gums.

Keep out of the reach of children in a container that small children cannot open.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Keep container tightly closed. Throw away any unused medicine after the expiration date.