Sildenafil is a medication that is used to treat erectile dysfunction in men and is also used to treat pulmonary hypertension, but is not used to relieve fatigue.
Sildenafil is a prescription medication that is currently used to treat erectile dysfunction in men and can also be used to treat pulmonary arterial hypertension. However, it does not relieve fatigue, and sildenafil has certain side effects, such as may lead to abnormal penile erection, hearing abnormalities, vision abnormalities, back pain and so on.
Sildenafil should not be used by people who use nitrate antihypertensive drugs to avoid causing low blood pressure.
Overall, sildenafil is a prescription drug with strict indications and side effects. It needs to be used under the guidance of a professional doctor and cannot be used blindly on its own.