Stendra is a prescription medication used to treat erectile dysfunction in men. Its active ingredient is avanafil, a phosphodiesterase type 5 inhibitor. The drug works by increasing blood flow to the penis during sexual stimulation. It does this by blocking the enzyme that normally limits the relaxation of smooth muscle in the penile tissue. The resulting vasodilation allows more blood to fill the erectile chambers, leading to an erection. Therapeutically, Stendra helps men achieve and maintain an erection sufficient for sexual activity. The effect begins within about 15 minutes and lasts up to six hours after dosing.

Stendra is a prescription medication used to treat erectile dysfunction in adult men. It works by inhibiting the phosphodiesterase type 5 enzyme which increases cyclic guanosine monophosphate levels in smooth muscle cells. This leads to relaxation of arterial tissue in the penis allowing increased blood flow during sexual stimulation. The resulting engorgement facilitates the achievement and maintenance of an erection sufficient for satisfactory sexual activity. By targeting a specific enzyme the drug provides a localized physiological response without affecting other bodily systems. Its effect depends on sexual arousal as the drug alone does not cause erection without stimulation.

Stendra is a medication used to treat erectile dysfunction in men. Headache is one of the most frequently reported side effects. Flushing or redness of the skin may occur after taking the drug. Nasal congestion or a stuffy nose can be experienced by some users. Back pain and muscle aches are also noted in clinical reports. Digestive discomfort such as indigestion may appear in occasional cases. Dizziness or light-headedness can be observed shortly after dosage. Most of these effects are mild and tend to resolve without medical intervention.

Common side effects include headache which some users report after taking Stendra. Flushing is also frequently observed with a sensation of warmth across the skin. Nasal congestion may occur causing a stuffy feeling in the nose. Digestive discomfort such as dyspepsia or mild stomach upset can be experienced. Dizziness or light-headedness may appear especially when standing up quickly. Back pain has been reported by a small proportion of users. Rarely some individuals notice a mild decrease in blood pressure leading to faintness. Most of these effects are mild and transient typically resolving without intervention.