In a study of healthy male volunteers, co-administration of sildenafil at steady state 80 mg t. The as-needed dose is usually 10 mg but can range from 5—20 mg. Children younger than 1 year of age—Use and dose must be determined by your doctor. For treatment of erectile dysfunction: For oral dosage form tablets : Adults up to 65 years of age—50 milligrams mg as a single dose no more than once a day, 1 hour before sexual intercourse. Figure 6 shows that regardless of the baseline levels of function, subsequent function in patients treated with VIAGRA was better than that seen in patients treated with placebo. Cialis stays in your system for up to 36 hours, and you can take it daily. Never take an extra dose to make up for a forgotten one.Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in is also used to treat pulmonary arterial hypertension, a serious heart and lung drug is more popular than comparable drugs. It is available in generic and brand versions. Generic sildenafil is covered by most Medicare and insurance plans, but . AdGet your ED medication shipped in an unmarked package within 4 hours at $0 delivery fee. Sorry no cure – not in our vocabulary! Find legit ED treatment affordably and conveniently. Sildenafil citrate is a white to off-white crystalline powder with a solubility of mg/mL in water and a molecular weight of VIAGRA is formulated as blue, film-coated rounded-diamond-shaped tablets equivalent to 25 mg, 50 mg and mg of sildenafil for oral administration.