Viagra is known as a drug that improves a man’s sexual capabilities. But the most widely used medication for the treatment of erectile dysfunction hides quite a few interesting facts that few people are familiar with. A study found that the active ingredient in Viagra, sildenafil, interferes with the action of an enzyme that is responsible for transmitting signals from the retina to the brain. When used in large quantities, the medication can cause vision impairment. Excessive use of the “love pill” can cause blurred vision, change color vision and increase sensitivity to light. There are even reports that an 86-year-old man lost his sight after using the drug. An interesting fact is the claims of several pharmaceutical companies that they created Viagra for women. The female version of the pill is supposed to increase the pleasure of sex. However, these claims turned out to be false. There is still no FDA-approved medication on the market that has the ability to direct blood to the clitoris to make the sex experience more exciting for a woman. NEWS_MORE_BOX Viagra can help women who suffer from menstrual cramps, according to some research data. Scientists believe that the active substance in the drug has the property of dilating blood vessels and relieving pain in the pelvis. However, these claims are still in the realm of conjecture and have not been proven. During the study, the medication was introduced vaginally and did not cause side effects until the end of the trial. There is evidence from laboratory studies that the love pill melts fat in the abdominal area and reduces the risk of obesity. The study suggests that white fat cells, which are abundant around the waist, can be converted into beige fat cells, which burn the energy from the food consumed and convert it into heat.