Cialis, Viagra Levitra ED Medications: Comparison of Dosage for Viagra. The recommended dose of Viagra is mg taken 30 minutes to 4 hours before sexual activity. What Drugs, Substances, or Supplements Interact with See full prescribing information for VIAGRA. VIAGRA (sildenafil citrate) tablets, for oral…
Viagra (Sildenafil) (Injection) – Side Effects, Interactions Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud’s phenomenon. Sildenafil…