Sildenafil Citrate is an oral drug for male impotence, also known as erectile dysfunction (ED). It works by dilating blood vessels in the penis, allowing the inflow of blood needed for an erection.

Sildenafil Citrate causes erections only during sexual excitement. It does not work in the absence of arousal.

Taking Sildenafil Citrate approximately 1 hour before sexual activity works best for most men. Depending on how and when the drug works for you, an interval of one-half hour to as much as 4 hours may prove ideal.

If you miss a dose: Sildenafil Citrate is not for regular use. Take it only before sexual activity.

Storage: Store at room temperature.

Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Sildenafil Citrate.

More common side effects may include: Abnormal vision (color tinge, blurring, sensitivity to light), acid indigestion, diarrhea, flushing, headache, nasal congestion, urinary tract infection

Heart attack, stroke, heart irregularities, dangerous surges in blood pressure, and sudden death have all been reported after use of Sildenafil Citrate, usually in men with existing cardiac risk factors, and typically during or shortly after sex.

Do not take Sildenafil Citrate if you are taking any nitrate-based drug, including nitroglycerin patches (Nitro-Dur, Transderm-Nitro), nitroglycerin ointment (Nitro-Bid, Nitrol), nitroglycerin pills (Nitro-Bid, Nitrostat), and isosorbide pills (Dilatrate-SR, Isordil, Sorbitrate). Combining Sildenafil Citrate with these drugs can cause a severe drop in blood pressure.

If Sildenafil Citrate gives you an allergic reaction, do not use it again.