Viagra is the scientific name of the drug sildenafil, which is used to treat pulmonary hypertension and erectile dysfunction, so that it relaxes muscles in the walls of blood vessels, causing enlargement and increased blood flow to certain areas of the body.

Sildenafil keeps erection longer but does not treat erectile dysfunction or erectile dysfunction, does not affect libido and does not act as a sexual stimulant.

Effect of Viagra on the body

-Effect of Viagra on the circulatory system

*Viagra causes the expansion of blood vessels, which increases blood flow, especially in the penis, which generates pressure that causes erection.

*Viagra can cause redness and excessive sweating

*One of its side effects on the circulatory system is to cause low blood pressure after one or two hours of ingestion

*People suffering from cardiovascular disease, high blood pressure, stroke, stroke, or angina should consult a doctor before using Viagra.

-Effect of Viagra on the reproductive system

*Viagra helps maintain erection for a longer period but does not treat erectile dysfunction or impotence and does not affect libido and the person needs stimulation and sexual arousal until erection occurs.

*The effect of Viagra can last for four hours and some men may last longer.

*Some dangerous and rare side effects can occur as a long-lasting erection that causes pain and requires medical attention. Patients with Pherioni are advised to refrain from using Viagra.

-The central nervous system

*Although Viagra affects the penis and increases erectile function but does not affect the most important member of the sexual process is the brain, which is responsible for the desire and feeling sexual excitement

*That is, if a person does not have a desire to have sex, there will be no effect on Viagra.

*Viagra can cause side effects such as headaches, runny nose or nasal congestion

*In less common cases can cause the tonsils, hearing loss or loss of vision

*Patients with non-arterial anterior neuropathic neuropathy should not use Viagra.

- Digestive system and output device

*One common side effect of Viagra is indigestion or heartburn, and can sometimes cause nausea or vomiting.

*Viagra can be taken with or without food

* It is best to be taken  an hour before sex.