How long can a normal person last on Viagra

The efficacy of Wan Ai Ke Si Di Na Fei in normal individuals usually lasts for 4-6 hours, depending on individual metabolic differences, drug dosage, dietary factors, physical condition, and drug interactions.

Viagra can be used as a phosphodiesterase 5 inhibitor, and its mechanism of action is to improve erectile function by enhancing the vasodilation effect mediated by nitric oxide. After oral administration, it takes about 30-60 minutes for a healthy adult male to take effect, and the blood drug concentration reaches its peak within 1 hour, with a half-life of about 3-5 hours. A high-fat diet may delay drug absorption but not affect total absorption, and individuals with liver dysfunction may experience a slower metabolic rate. Combined use with nitrate drugs can cause severe hypotension, and grapefruit juice may inhibit liver metabolic enzymes and prolong the duration of its efficacy. Some individuals may experience mild adverse reactions such as headaches, facial flushing, and indigestion, while severe reactions such as visual abnormalities or hearing loss are relatively rare. Exercise tolerance should be evaluated before use in patients with cardiovascular disease, and it is contraindicated for those with anatomical abnormalities of the penis. Avoid using alpha blockers simultaneously to prevent sudden drops in blood pressure, as drinking alcohol during medication may exacerbate vasodilatory effects.

It is recommended to take as needed under the guidance of a doctor and avoid adjusting the dosage on your own. Maintaining a regular schedule and moderate exercise can help maintain normal sexual function, while a balanced diet can reduce drug metabolism interference. If there are abnormal symptoms such as persistent erection for more than 4 hours or chest pain, medical treatment should be sought immediately. For those with erectile dysfunction for a long time, the potential causes such as hypertension and diabetes need to be investigated, rather than relying on drugs for short-term improvement.