You might start on the 50mg sildenafil dose but other dosages are available. This sort of problem can sometimes be resolved by moving to the lower dose. The generics cost much less, and—in the case of sildenafil—come in 20 mg doses. Sometimes having the pills at the ready, in your overnight bag or medicine cabinet, can give you that little extra boost of confidence when it comes to having great and satisfying sex. Also, as you get older your body may be slower at getting rid of sildenafil.Although erectile dysfunction (ED) may be an upsetting diagnosis for some, many people find their condition is treatable with Viagra — sometimes called the “little blue pill” — and . What erectile dysfunction pills are available? In addition to Viagra, other ED drugs available in the United States include avanafil (Stendra), tadalafil (Cialis) and vardenafil . Viagra tablets are available in three strengths: 25 milligrams (mg) 50 mg mg Typical dosages The following information describes commonly recommended dosages for ED. .