Place the tip of the syringe into you or your child’s mouth and point it towards the cheek. However, the dose is usually not more than 80 mg 3 times a day. Pregnant Women: There are increased risks for stroke, heart failure, preterm delivery, and maternal and fetal death for pregnant women with untreated pulmonary arterial hypertension. The usual adult dose is 20mg taken 3 times a day. This medicine comes with a patient information leaflet. It is not known if the medicine is safe for use in these patients. It is important to tell your doctor about any heart problems you have now or may have had in the past.AdDon’t go to the pharmacy without checking prices at GoodRx® first. No commitment or fees. Find the lowest price in your neighborhood & use our free coupons to save up to 80%Works for Whole Family · No Credit Card Required · No Insurance Required4/5 (1, reviews)”The lowest prices on specific drugs” – Family Circle. Sildenafil is used to treat erectile dysfunction (ED) and to reduce blood pressure in pulmonary arterial hypertension (PAH). It is taken when needed for ED and daily for PAH. A headache, stomach upsets, and flushing are the main side effects, and it should not be taken within 24 hours of a nitrate. 5. Tips. Viagra comes as an oral tablet in different dosages. Discuss with your doctor what’s an appropriate dose for you. For daily use, Goldstein said, the generic form, sildenafil, comes in mg tablets.