What is Viagra?
VIAGRA is a medicine used to treat erection difficulties, such as erectile dysfunction (ED). Since it first became available in 1998, VIAGRA has helped more than 16 million men around the world improve their sex lives. Amazingly, 9 tablets are dispensed every second worldwide. And no other therapy for ED has been studied as much or has the same amount of real-world experience as VIAGRA since its launch. It’s no wonder more than 600,000 doctors have chosen VIAGRA for their patients with ED.

Fact is, when taken correctly, VIAGRA works for most men. Studies show that it works for up to 4 out of 5 men (versus 1 out of 4 on sugar pill). VIAGRA improves erections in most men no matter how long they have had ED, what caused it, how often they have it, or how old they are. And VIAGRA has been proven to work in clinical studies of thousands of men.

VIAGRA works by increasing blood flow to the penis. It is not a hormone or an aphrodisiac. Once you take it, VIAGRA can work in as quickly as 30 minutes. VIAGRA works for at least 4 hours so you can set your own pace. And, in most patients, VIAGRA can be taken as often as once a day.

Possible uses of this medication
Viagra is used to treat male sexual function problems (erection problems).

How to take this medication
Viagra is taken by mouth as needed between four hours and one-half hour before sexual activity (about one hour before is most effective). Take only as directed, usually once daily as needed. Sildenafil works along with sexual stimulation to help achieve an erection.

Side Effects
Headache, flushing, stomach upset, nasal stuffiness, diarrhea and dizziness might occur. If these effects persist or worsen, notify your doctor promptly.

Precautions
Before using Viagra, tell your doctor your medical history, including any allergies (especially drug allergies), any penis conditions such as fibrosis/scarring, history of painful/prolonged erection (priapism), sickle cell anemia, blood system cancers (such as leukemia or myeloma), or Peyronie's disease, eye problems (retina diseases). kidney or liver disease, bleeding disorders or active stomach ulcers, heart diseases, stroke or severe high or low blood pressure. Limit alcohol intake, as it may aggravate side effects of this drug. To avoid dizziness and lightheadedness when rising from a seated or lying position, get up slowly. The elderly may be more sensitive to the side effects of this drug, therefore caution is advised in this group.

Drug Interactions
Tell your doctor of all nonprescription and prescription medication you may use, especially any nitrate medications (e.g., nitroglycerin, isosorbide dinitrate), nitroprusside (any "nitric oxide donor" medicines), cimetidine, erythromycin, azole antifungals (e.g., itraconazole, ketoconazole), mibefradil, rifamycins (e.g., rifampin) or high blood pressure medicines.

Missed Dose
Not applicable.

Storage
Store at room temperature between 59 and 86 degrees F (15-30 degrees C) away from light and moisture. Keep this and all medications out of the reach of children.

Notes
Do not share Viagra with others, since they may have a problem that is not effectively treated by this drug. Use of this drug does not protect against sexually transmitted diseases (e.g., HIV, Hepatitis B, gonorrhea).