For treatment of pulmonary arterial hypertension: For oral dosage forms suspension or tablets : Adults—20 milligrams mg 3 times a day. Push the plunger of the syringe, then insert the tip into the bottle while holding the bottle upright on a flat surface. Children—Use is not recommended. Mean sildenafil plasma concentrations measured after the administration of a single oral dose of mg to healthy male volunteers is depicted below: Figure 5: Mean Sildenafil Plasma Concentrations in Healthy Male Volunteers. May make this condition worse. Take sildenafil as needed before sexual activity. If you are taking sildenafil to treat PAH, you will probably take sildenafil three times a day with or without food.Cialis lasts up to 36 hours in the body, while Viagra lasts 4–6 hours in the body. Both are taken 30 minutes before sex. Cialis can cause limb pain, while Viagra can cause vision change, rash. AdShop Forhims Online for Great Prices at Store Sale & Clearance. Up To 60% Off Forhims Official Sale. Now $ $ Suckng Rabbit Vbrtr for Women, FIDECH G Spot Dildo Stimulator 7 Suction and 7 Vibration Modes, Adult Sex Toys for Couple. 1. Save with. Shipping, arrives in 2 days. Now $ $ ESVOW Thrusting Rabbit Vibrator for Women Sex Toys with 7 Vibrations & Tongue Licking & Thrusting & Rotating Modes & Heating Function, 5 In 1.