Indications:

• herpes simplex infections
• prophylaxis of influenza A infection
• parkinsonism

Cautions:

• psychosis
• elderly patients
• breast feeding
• cardiovascular, hepatic or renal disease
• recurrent eczema
• avoid abrupt discontinuation of treatment

Contra-indications:

• epilepsy
• gastric ulceration

Side-effects:

• nervousness
• inability to concentrate
• insomnia
• dizziness
• convulsions
• hallucinations
• gastrointestinal disturbances
• skin discolouration
• dry mouth
• peripheral oedema
• leucopenia

Routes of administration:

• oral
• capsules
• syrup