Sildenafil is a drug used to treat erectile dysfunction in men. It is also known by the trade name Viagra. Below is a brief description of this substance and its features:

Mechanism of action: Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor. Erectile dysfunction is often associated with excessive PDE5 activity, which leads to contraction of blood vessels in the penis area. Sildenafil blocks the action of PDE5, which increases levels of cyclic guanosine monophosphate (cGMP), relaxing the smooth muscles of the blood vessels and increasing blood flow to the penis.

Treatment of erectile dysfunction: Sildenafil is widely used to treat erectile dysfunction, which is caused by both physical and psychogenic causes. It helps improve the ability to achieve and maintain an erection during sexual stimulation.

Fast-acting: Sildenafil usually begins to take effect about 30-60 minutes after taking it, although this time may vary from individual to individual. The effects usually last for 4-6 hours.

Dosage: It is usually recommended to take a dose of 50 mg about an hour before planned sexual activity. The dose can be adjusted depending on the patient’s reaction and possible side effects.

It is not an aphrodisiac: It is important to understand that sildenafil is not an aphrodisiac substance. It only works in response to natural sexual arousal to help improve the ability to achieve an erection.