What are sildenafil tablets?
SILDENAFIL (Viagra) is used to treat erection problems in men. Generic sildenafil tablets are not yet available.
How should I take this medicine?
Take sildenafil tablets by mouth. Follow the directions on the prescription label. The dose is usually taken 1 hour before sexual activity. You should not take this dose more than once per day. Swallow the tablets with a drink of water. Do not take double or extra doses. Taking Viagra 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.
Why should Viagra not be prescribed?
Do not take Viagra 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 Viagra with these drugs can cause a severe drop in blood pressure. If you notice any changes in your vision while taking this drug, notify your prescriber or health care professional as soon as possible. Stop using sildenafil right away if you have a loss of sight in one or both eyes. Contact your healthcare provider immediately.Contact you physician immediately if the erection lasts longer than 4 hours or if it becomes painful. This may be a sign of priapism and must be treated immediately to prevent permanent damage.If you experience symptoms of nausea, dizziness, chest pain or arm pain upon initiation of sexual activity after sildenafil use, you should refrain from further activity and should discuss the episode with your prescriber or health care rofessional as soon as possible.
Do not change the dose of your medication. Please call your prescriber or health care professional to determine if your dose needs to be reevaluated.
If you have heart problems severe enough to make sexual activity a danger, you should avoid using Viagra. Use it cautiously—if at all—if you've had a heart attack, stroke, or life-threatening heart irregularities within the past 6 months. Be equally cautious if you have severe high or low blood pressure, heart failure, or unstable angina (crushing heart pain that occurs at any time).
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