Viagra is a trade name for the drug created based on the active substance Sildenafil. This medicine is used to improve the potency of men. The name Viagra is a registered trademark owned by the pharmaceutical company Pfizer, which developed the medicine. Sildenafil provides increased blood flow to the pelvic area, including the penis. Thanks to this property, Viagra is used to treat erectile dysfunction in men. Today, Viagra is sold freely online, for example by https://viagraonline.co.uk/ and many other online stores.
How did Viagra appear?
Pfizer was developing a new drug designed to treat cardiovascular disease. The main active substance, considered by pharmacists, was Sildenafil Citrate. It was supposed to provide greater blood flow to the heart muscle and, as a result, the patient’s blood pressure would decrease. But studies carried out in 1992 in the city of Sandwich in the United Kingdom showed that the drug has neither the expected effect on heart muscle nor pressure.
However, some male representatives who participated in drug tests refused to return it. The reason for the refusal was quite unexpected – they all noticed a marked improvement in erectile function. That is, despite the fact that the influx of blood into the heart muscle has not changed, blood circulation in the pelvic area and in the penis has increased many times. The company’s merchants saw an indisputable source of income on Sildenafil, and testing of the drug at its base continued. Only now is it a drug designed to treat erectile dysfunction – impotence.
In 1993, Viagra studies started to be carried out from this point of view. Clinical trials have shown that this drug does have a powerful effect, is highly effective and, at the same time, is safe from the point of view of impotence. In March 1998 Viagra received permission from the US Food and Drug Administration (the Food and Drug Administration – FDA) to begin production as a medicine.
What do you need to know before taking Viagra?
Consult your doctor before taking Viagra. Tell him about all the medications you are currently taking. This is very important, because some medications when taken with Viagra can cause undesirable consequences, including those that are dangerous to health. Refuse to take Viagra if you are currently taking nitrates and nitrate-like drugs, including medications with such active substances as nitroglycerin, isosorbide dinitrate, isosorbide mononitrate. By integrating, Viagra and these substances can dramatically and severely lower blood pressure. In addition, Viagra is incompatible with many light drugs in the poppers group.
Do not take Viagra and its analogues simultaneously – Levitra (active ingredient in Vardenafil), Stendra (active substance in Avanafil), Cialis (active substance in Tadalafil).
It is also not appropriate to take Viagra and Revacio at the same time.
Without medical consultation, do not take other medications with Viagra at the same time for the treatment of impotence. Taking alcoholic beverages after taking Viagra can lead to lower blood pressure and have the opposite effect, reducing sexual function.
Simultaneous administration of Viagra and grapefruit or grapefruit juice (as well as dishes and drinks that contain them) can cause unwanted side effects.
People over 65 should take Sildenafil with caution, as it can have an unpleasant effect on the body.
Side effects
If you are over 18 years old and under 60 years old, you have no illnesses and do not take medication, then the following side effects associated with taking Sildenafil are likely:
– Headaches, muscle pain and back pain. Indigestion and diarrhea. Decreased blood pressure, nasal congestion, constipation, nosebleed, sleep disorders.
RARE: a sudden loss of vision may appear due to the weakening of the optic nerve’s blood supply. Men over 50 who have diabetes mellitus in the anamnesis may have heart disease, high blood pressure and high cholesterol. Smokers and people with existing vision problems are also at risk.
RARE: long (more than 4 hours) and painful erection.
Side effects that require immediate medical attention
Taking Viagra is very rarely accompanied by serious side effects. However, this happens and, if any of the following symptoms occur, it is necessary to consult a doctor.