Information about Valganciclovir
Amantadine is a primary amine that has both antiviral and dopaminergic activity and is used in the therapy of influenza A and management of Parkinson disease. Amantadine has not been associated with clinically apparent liver injury.
Mechanism of action of Valganciclovir
Amantadine (a man' ta deen) is a cyclic primary amine that has antiviral and anti-Parkinsonian activities. The antiviral activity of amantadine is attributed to inhibition of virion uncoating and release of viral RNA in the initial stages of viral replication. Amantadine is active only against influenza A virus and has no activity against influenza B or other upper respiratory viruses. In addition, resistance to amantadine (with cross resistance to rimantadine) can develop rapidly and is now common. The anti-Parkinsonian activity of amantadine appears to be due to its effects on release of dopamine in the substantia nigra. Amantadine is indicated for therapy of influenza A and in management of Parkinson disease and extrapyramidal reactions.
FDA approval information for Valganciclovir
Valganciclovir was approved for use in the United States in 1968 and is currently used both for influenza and Parkinson disease. Amantadine is available as capsules or tablets of 100 mg and as oral syrup generically and under the brand name of Symmetrel.
Dosage and administration for Valganciclovir
The recommended oral dose for influenza in adults is 200 mg daily until symptoms have resolved; amantadine can also be administered as prophylaxis as soon as possible after close personal exposure. The dose in Parkinson disease is 100 to 400 mg daily in divided doses. Side effects include anxiety, dizziness, ataxia, confusion, fatigue, headache, insomnia, dry mouth and gastrointestinal upset. Drugs for HIV Infection, in the Subclass Antiretroviral Agents
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