Amantadine is a medicine that is used to treat and prevent infection with influenza (flu) viruses. It also is effective in treating some symptoms of Parkinson's disease, although it is not clear how it works. Amantadine may cause greater amounts of dopamine to be released in the brain, and it may block receptors for acetylcholine, a brain chemical that contributes to control of movement. For normal motor or muscle control, acetylcholine and dopamine levels need to be balanced carefully.
Amantadine can be used by itself to treat people who are in the early stages of Parkinson's disease. It is best used in people who have mild to moderate symptoms.
Amantadine also can be used with levodopa in the later stages of Parkinson's disease to reduce dyskinesias.
Amantadine can reduce dyskinesias in some people taking levodopa long-term for Parkinson's disease.1
All medicines have side effects. But many people don't feel the side effects, or they are able to deal with them. Ask your pharmacist about the side effects of each medicine you take. Side effects are also listed in the information that comes with your medicine.
Here are some important things to think about:
Call 911 or other emergency services right away if you have:
Call your doctor right away if you have:
Common side effects of this medicine include:
See Drug Reference for a full list of side effects. (Drug Reference is not available in all systems.)
Amantadine doesn't work for everyone. It may take up to 2 weeks to be fully effective. Benefits can continue for as long as 1 year but often wear off during that period of time.
Do not drink alcohol when you are using this medicine. Alcohol can make some of the side effects of amantadine worse, such as dizziness, fainting, or confusion.
Medicine is one of the many tools your doctor has to treat a health problem. Taking medicine as your doctor suggests will improve your health and may prevent future problems. If you don't take your medicines properly, you may be putting your health (and perhaps your life) at risk.
There are many reasons why people have trouble taking their medicine. But in most cases, there is something you can do. For suggestions on how to work around common problems, see the topic Taking Medicines as Prescribed.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
Last Revised: February 1, 2012
This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.