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What is Amantadine HCl used for?

Amantadine HCl is used to prevent or treat respiratory tract infection namely flu (influenza A). This antiviral medication is also used to treat Parkinson’s disease, as well as drug-induced extrapyramidal reactions caused by certain psychiatric drugs. This medicine may also be used to treat other conditions as determined by your doctor.

What are the side effects of Amantadine HCl?

Like other medicines, Amantadine HCl can cause some side effects. If they do occur, the side effects of Amantadine HCl are most likely to be minor and temporary. However, some may be serious and may require the individual to inform the doctor or visit the nearest hospital immediately.

It is pertinent to note that side effects of Amantadine HCl cannot be anticipated. If any side effects of Amantadine HCl develop or change in intensity, the doctor should be informed as soon as possible.

Amantadine HCl can cause side effects such as dry mouth, drowsiness, dizziness, stomach upset, nausea, headache, and constipation. Some of the serious side effects of this drug include depression, shortness of breath, fast heartbeat, and swelling of the hands, legs, or feet. This is not a complete list of all side effects. Do concur with your doctor and follow his directions completely when you are taking Amantadine HCl.

What is the recommended dosage of Amantadine HCl?

The dosage of Amantadine HCl prescribed to each patient will vary. Always follow your physician’s instructions and/or the directions on the prescription drug label.

Amantadine HCl may be taken with or without food.

What if you miss a dose of Amantadine HCl?

If your physician has instructed or directed you to take Amantadine HCl medication in a regular schedule and you have missed a dose of this medicine, take it as soon as you remember. However, if it is almost time for your next dose, then skip the missed dose and go back to your regular dosing schedule. Do not double the doses unless otherwise directed.

What if you overdose on Amantadine HCl?

Any medication taken in excess can have serious consequences. If you suspect an overdose of Amantadine HCl, seek medical attention immediately. Some of the overdose symptoms of this drug are severe drowsiness, fast or irregular heartbeats, mental/mood changes, seizures, and blurred vision.

What other drugs could interact with Amantadine HCl?

It may be noted that drugs other than those listed above may also interact with Amantadine HCl.

Usually drug interactions occur when it is taken with another drug or with food. Before you take a medication for a particular ailment, you should inform the health expert about intake of any other medications including non-prescription medications, over-the-counter medicines that may increase the effect of Amantadine HCl, and dietary supplements like vitamins, minerals and herbal, so that the doctor can warn you of any possible drug interactions.

Amantadine HCl can interact with certain psychiatric medicines, certain diuretics, anticholinergics, antihistamines, and cough-and-cold products.

Do let your doctor know if you smoke, consume alcohol or caffeinated drinks, or use illegal drugs as these may interfere with the action of your medication. Make sure to inform your doctor of any medical conditions you may have, or any family history of medical problems. Do not start or stop using any medicine without consulting your doctor.

What are the questions to ask your doctor before taking Amantadine HCl?

Is it possible for me to take Amantadine HCl with other drugs?
Should certain beverages, foods and other products be avoided when I take Amantadine HCl?
What are the possible drug interactions of Amantadine HCl?
How will Amantadine HCl work in my body?
How should Amantadine HCl be taken?
How to reduce the risk of Amantadine HCl drug interactions and side effects?


The health and medical information provided here is intended to supplement and not substitute for the expertise and judgment of your physician, pharmacists or other health care professional. Before taking Amantadine HCl, inform your doctor if you suffer from heart, liver or kidney problems, stomach ulcer, and epilepsy. Avoid excessive use of alcohol while using this medicine. Amantadine HCl is not recommended for pregnant women as well as nursing mothers. Store it at room temperature and away from excess heat and moisture. Keep this medication out of the reach of children.


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