Viagra is sildenafil citrate, if it meets the indications for a short period of time there is generally no harm, but long-term use may have adverse reactions.
Sildenafil citrate is used to treat erectile dysfunction, and if taken in small doses and in strict accordance with medical advice, it is less harmful to the human body and generally not enough to cause adverse reactions.
However, some patients with more serious impotence may need to take sildenafil citrate for a long time or in large doses, and if they do not pay attention to moderation, there may be bad effects, such as dizziness, headache, skin flushing after taking; some men may cause indigestion, vision abnormalities, and can cause back pain, nausea, and a very small percentage of the population is prone to myocardial infarction, sudden cardiogenic death, and so on.
Taking sildenafil citrate tablets should be aware of, allergic to the drug ingredients is prohibited, lactation, pregnancy, childhood, neonatal period is prohibited. Patients who are taking a-blockers should take it with caution. The drug may cause a series of adverse reactions when taken for a long time, if the symptoms are mild, there is no need for special treatment, while serious cases need to stop the drug in time and consult a doctor immediately.
If you need to take sildenafil citrate, you should be under the guidance of a professional physician, it is not recommended to take without authorization.