Most of the time, doctors begin with the 50-mg dosage. This dosage isn’t right for every Viagra user, but it’s in the middle of your options, and makes it easy to move up or down in dosage to learn which is most appropriate. If 50 mg isn’t effective, and if it hasn’t caused unpleasant side effects, your doctor may choose to bump it up to 100 mg and ask you to report back.
Keep in mind that whichever dosage your doctor chooses, it’s going to be a maximum of one dose every 24 hours. In other words, if your doctor prescribes 50 mg, that doesn’t mean you should take 25 mg twice a day in hopes of stretching out the benefits. Also bear in mind that any other medications (including over-the-counter medications and supplements) can affect your experience with Viagra, so it’s absolutely essential to tell your doctor the names and dosages of any drugs or supplements you take.