Chien Wei is the trade name, generic name of sildenafil citrate, after taking it can be due to vasodilatation resulting in headache, facial flushing, nasal congestion and runny nose, etc., usually for a short period of time, and seldom have serious after-effects.
Sildenafil activates guanylate cyclase in the body, which promotes relaxation of the cavernous muscles of the penis and increases blood flow to the penis, thereby increasing the hardness of the erection.
Its adverse reactions are generally related to the vasodilator effect it causes, such as intracranial vasodilatation of headache, nasal vasodilatation of runny nose, flushing of the face, etc., which are generally milder complications, and can be recovered after discontinuation of the drug and will not lead to serious sequelae.
However, it should be noted that during the use of the drug must not be used at the same time with nitrate drugs, otherwise it will cause serious hypotension, or even life-threatening. In addition, the drug is also prohibited for women, people who are allergic to the product, children, and people whose recent cardiovascular state does not allow them to have sex.
The drug is a prescription drug and must be applied under the supervision of a doctor.