What is Viagra?

What is Viagra?

Viagra is a drug used to treat erectile dysfunction (impotence) in men. It relaxes the muscles in the walls of blood vessels and increases blood flow to the penis.

Viagra is a potent selective (selective) inhibitor of cycloguanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5).

The pharmacological effect of this therapeutic action works by releasing nitric oxide (NO) into the corpora cavernosa via sexual stimulation. As a result, blood flow to the penis is increased and its smooth muscle fibers are relaxed.

What you need to know before taking Viagra

hat you need to know before taking Viagra

First of all, you should stop taking Viagra if you have an allergic reaction. Also, it should not be taken if you are taking medicines to treat pulmonary hypertension (especially Adempas, an antihypertensive medicine which stimulates the enzyme guanylate cyclase).

Additionally, you should not use Viagra if you are taking nitrate medications (e.g., nitroglycerin, isosorbide dinitrate) for the treatment of heart pain, as the latter’s mechanism of action is also associated with the release of the NO factor. As a result of this joint interaction, vasodilation may increase and this will lead to a sharp drop in blood pressure with possible loss of consciousness.

Before using Viagra, you should see a doctor to take your medical history to make sure there are no conditions such as:

  • problems with the cardiovascular system (arrhythmia, low or high blood pressure, coronary artery disease);
  • circulatory problems;
  • retinitis pigmentosa (hereditary eye disease);
  • violation of visual function;
  • blood disorders (eg anemia, leukemia);
  • pulmonary veno-occlusive disease (complications of pulmonary hypertension, in which the small pulmonary veins are affected);
  • liver and / or kidney diseases;
  • physical deformity of the penis (for example, Peyronie’s disease).

It is also especially important to talk to your doctor before taking this medicine if you are pregnant or planning to become pregnant, or breastfeeding a baby. Viagra is authorized from the age of 18.

How to take Viagra?

How to take Viagra?

Viagra is taken if necessary 30 minutes or 1 hour before sexual intercourse. You can also take it 4 hours before sexual activity. Viagra will only show its therapeutic effect if sexual stimulation is used.

Viagra can only be taken once a day in the dosage prescribed by the doctor.

Mode of application and dosage of Viagra

Usual adult dose for erectile dysfunction.

Starting dose: 50 mg orally once a day as needed 1 hour before sexual activity.

Maintenance: 25 to 100 mg orally once a day, as needed, 1 hour before sexual activity.

Usual geriatric (elderly) dose for erectile dysfunction.

Starting dose: 25 mg orally once daily 1 hour before sexual activity.

To note!

If at the time of sexual intercourse after taking Viagra you experience pain, numbness or tingling in the chest, arms, neck or jaw, you should stop the process and immediately consult a doctor. Such symptoms may indicate serious side effects of Viagra with a subsequent risk of complications.