Fildena 100 mg pills are a prescription-only medication that comes in a variety of dosages and alternatives. Since the age and severity of the disease differ from person to person, you should consult your doctor about its frequency and duration. It is always recommended to take it slowly when trying an erectile dysfunction tablet for the first time. It is generally best to take 25 mg or 50 mg. Once you fully understand the effects of a lower dose on your body, you can increase the dose gradually.