However the dose is usually not more than 40 mg 3 times a day. Do not press on the plunger of the syringe. If too much is used, the chance of side effects is increased. For treatment of pulmonary arterial hypertension: For oral dosage forms suspension or tablets : Adults—20 milligrams mg 3 times a day. Place the tip of the syringe into you or your child’s mouth and point it towards the cheek. Do not use more of it and do not use it more often than your doctor ordered.Strengths: 25 mg, 50 mg, mg; Brand: Viagra. Form: oral tablet; Strengths: 25 mg, 50 mg, mg; Adult dosage (ages 18–64 years) Typical dosage: 50 mg, taken as needed. Find patient medical information for Viagra oral on MD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. AdMany Americans pay far too much for their prescriptions. We’re here to help. Compare pharmacy prices in your area, get the free coupon, & see how much you can save!4/5 (1, reviews)Site visitors: Over K in the past month.