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Symmetrel (Amantadine Hydrochloride)

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Full information about Symmetrel

General Information on Symmetrel

Amantadine hydrochloride is the generic name and main chemical of Symmetrel, and its pharmacological actions define it as an antiviral drug as well as an anti-Parkinson medication. It is available in the form of a syrup and tablet. Amantadine hydrochloride is also the primary ingredient in Symmetrel and is known as 1-aminoadamantane or 1-adamantylamine. It is primarily administered to patients with Parkinson’s disease and influenza B infection. It's mechanism of action for the treatment of Parkinson's and influenza B virus is unknown. Most doctors recommend Symmetrel treatment for chronic fatigue in patients suffering from multiple sclerosis. You can buy Symmetrel online only after getting a doctor’s prescription for the same.

Side effects of Symmetrel

The side effects of Symmetrel can vary from mild to severe and even fatal. The most common and mild side effects of Symmetrel include symptoms of allergic reactions like rashes, hives, and swelling of the tongue, face, and lips.

The severe side effects of Symmetrel will vary from one patient to another. The symptoms include breathing problems and shortness of breath, quick weight gain, depression, change in behavior, aggressive behavior, hallucinations, suicidal tendencies, and little or no urination. Suicide attempts have been often reported as a side effect of this medication, although the pathophysiologic mechanism has never been known. Symmetrel is known to cause mental problems or aggravate existing mental problems. The symptoms include delusional behavior, personality changes, paranoia, disorientation, other psychotic reactions, and even insomnia.


Patients being administered with Symmetrel need to take certain precautions as this medication can cause serious side effects. Special care needs to be taken for patients with epilepsy as the drug can increase the frequency of seizures. Patients can also suffer from acute toxicity because of the anticholinergic effects of the medicine. Patients are recommended to buy Symmetrel only after consulting a doctor, and a drug overdose should be avoided as this can lead to central nervous system toxicity, renal complications, and respiratory and cardiac problems.

Symmetrel Dosage

The dosage of Symmetrel varies from patient to patient. The recommended dose for adults is two tablets of Symmetrel 100mg or Symmetrel 200 mg as a single dose daily. The total daily dose for pediatric patients aged 1 to 9 years needs to be calculated. The basis of calculation is 2 to 4 mg/lb/day and should not be more than Symmetrel 150mg. For patients between 9 and 12 years of age, the daily dose should not exceed Symmetrel 200 mg, and this treatment should continue for a period of 10 days for those with Influenza A. For adults suffering from Parkinson's disease, the daily recommended dose is Symmetral 100 mg to be given twice a day. If the response of the patient is not positive, the doctor can increase the daily dose to 400mg as well.


Symmetrel interacts with different drugs, especially medications that have anticholinergic properties. It should not be administered along with thioridazine, dyazide, quinidine or quinine. It should also not be concurrently administered with live attenuated influenza vaccine (LAIV) intranasal, as this can increase the risk of potential side effects. Inform your doctor about all the drugs you’re using before you buy Symmetrel to avoid any serious complications.

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