Valif contains vardenafil, a prescription medicine used to treat erectile dysfunction in adult men. It belongs to the class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Valif works by enhancing the natural process of erection during sexual stimulation. It helps improve blood flow to the penis, allowing for a firm and sustained erection when needed.

Mechanism of Action
Vardenafil works by inhibiting the enzyme PDE5, which is responsible for breaking down cyclic guanosine monophosphate (cGMP) in the smooth muscle of the penis. Normally, sexual stimulation triggers the release of nitric oxide, which increases cGMP levels. This chemical causes the penile blood vessels to relax and widen, allowing more blood to flow into the penis and create an erection. By blocking PDE5, Valif helps maintain higher cGMP levels for a longer period, supporting a natural and more sustained erection.

Uses
Valif is used for the treatment of erectile dysfunction, a condition in which a man has difficulty achieving or maintaining an erection suitable for sexual activity. It is taken orally, typically thirty to sixty minutes before sexual activity. It works only in the presence of sexual stimulation and does not increase sexual desire or arousal on its own.

Adverse Effects
Valif is generally well tolerated, but it can cause some side effects.
Common effects include headache, flushing, nasal congestion, and dizziness. Some men may also experience back pain or indigestion.
Occasionally, visual changes such as increased sensitivity to light or blurred vision may occur.
In rare cases, serious side effects such as a prolonged erection, sudden hearing loss, or vision loss may happen. These require immediate medical attention.
Men taking nitrates or with serious heart conditions should avoid Valif due to the risk of a dangerous drop in blood pressure.