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Common uses

Viagra is a medicine used to treat erectile dysfunction disorders.

Instructions

Viagra comes in tablets containing sildenafil citrate for oral consumption. The most commonly prescribed dosage is 50mg, taken about one hour before intercourse. You can take it as early as four hours beforehand, but any earlier than that is advised against. The dosage may be adjusted accordingly, if you've got any special conditions. In most cases the default one should be fine for your needs.

Warnings

The default dosage of 50mg should be changed to 25mg for patients over the age of 65, as well as those with hepatic impairment or renal impairment. If you're being treated with Ritonavir, it's crucial to stay below a dosage of 25mg over a 48 hour period - the two drugs are known to interact with each other heavily, so mixing them wouldn't be a good idea in terms of side effects.

The drug enhances the effects of nitrates, so patients being treated with such medicines should be extremely careful to avoid any Viagra usage for the duration of their therapy. Also, keep in mind that Viagra is not a solution to any problems you might have with your sexual intercourse that are not related to your ability to sustain an erection - if you've been advised against taking part in sexual intercourse by your doctor, using Viagra will not change that fact.

If you've had any serious health issues during the past six months, especially related to your heart, using Viagra should be done with extreme caution - you'd best consult a doctor beforehand, and explain to them everything you have suffered from during the past six months. Conditions you should pay special attention to include a stroke, arrhythmia, as well as myocardial infraction.

Some symptoms may lead to complications when using Viagra. For example, bleeding disorders can have unpredictable effects on Viagra users, so if you're suffering from such a condition, refrain from using Viagra at all cost. Individuals born with a physical deformation in the penis should also be careful when using Viagra.

Make sure you use Viagra isolated and don't combine it with other similar medicines. Viagra has not been tested in such ways and it's unknown how it will react to such conditions and what reactions may occur in your body.

Side effects

Viagra has a few side effects commonly associated with it - these are headaches, nausea, flushing, and dyspepsia. Sometimes, your erection may last for a lot longer than you'd expect, going for even a few hours. While this is rare, it can happen to some, and you should seek immediate medical attention if you experience something of this kind. Other side effects include an infection of the urinary tract, distorted vision, dizziness and diarrhea.

Overdose

Viagra overdoses have not been studied extensively, so we can't predict for sure what's going to happen if you fall victim to one. In all cases, contact a medical institution immediately if you feel you could've overdosed on Viagra.

Final notes

Viagra should be kept in a cool, dry place, away from direct sunlight exposure and out of reach for children. Take note that the information provided above is not meant to replace a professional's opinion on the matter, and you should always contact a doctor before using Viagra or any similar drugs.