When a man is sexually excited, the penis will fill with enough blood to cause an erection. Viagra™ works by increasing blood flow to the penis, as well as causing penile muscles to relax. It does not, however, initiate an erection. This is a common misconception that has led to widespread disappointment.

Scientists have found that in men suffering from erectile dysfunction, an enzyme constricts blood flow to the penis. This enzyme is called phosphodiesterase type 5 (PDE5). Viagra™ stores blood flow in an already-stimulated penis by inhibiting the action of this enzyme.

By inhibiting PDE5, smooth muscle in the penis remains relaxed for a longer period. This allows for increased blood flow into the cavernous tissue of the penis thereby generating an erection. Sexual stimulation is still required to get an erection, but often times, less than would be normally required.

For Viagra™ to be effective, one must be able to initiate a partial erection in response to sexual stimulation. In the absence of this partial erection, or without sexual, tactile stimulation, Viagra™ will not work. Also Viagra™ can only be effective if the erectile dysfunction is due to neurological factors rather than emotional or psychological factors. If a man who doesn't have circulation problem uses Viagra™, it will not increase his response. In other words, Viagra™ is not an aphrodisiac which might increase sexual response, although it is an enhancer of circulation and that's why it's effective.

Viagra™ works best when taken at a dosage of 100mg, approximately one hour before sex on an empty stomach and is effective for about 4 hours. Studies show that it may take six to eight tries before it works optimally, as it may require time to overcome performance anxiety.

Viagra™ is an effective medication in restoring erectile ability, but it does not care about other aspects of sexual health. Viagra™ only gives erections for a limited time, not without risks and side effects. It does not treat the actual cause of erectile dysfunction.

People, who prefer non-drug alternatives, should reflect on what they can do for their sexual health to never need Viagra™, or consider natural Viagra™ alternatives to achieve a mild approach toward positive sexual health.