Viagra generally refers to sildenafil tablets, and the effects of the drug generally last for 0.5 to 4 hours.
Sildenafil tablets are type V phosphodiesterase inhibitors that work primarily to treat erectile dysfunction. Most patients with erectile dysfunction can last for about 2 hours after using the medication, but the duration of the medication varies as each person has a different body type. The longer duration can be about 4 hours and the shorter one may be only 0.5 hours.
The main common adverse effects of Sildenafil Citrate Tablet are headache, flushing, dizziness, nasal congestion, indigestion, and visual abnormalities. The drug is prohibited in combination with nitrates, and it is contraindicated in women, those who are allergic to the product, children, and those whose recent cardiovascular state makes them unfit for sexual intercourse.
However, decreased erectile function can not be treated exclusively by sildenafil, some patients suffer from decreased erectile function due to hormone level disorders, inflammation of the reproductive system and other reasons. These patients may not be effective, or even ineffective, with the use of sildenafil alone if they are not treated according to the cause.
It is best to check before using the drug to clarify the cause of erectile dysfunction and then carry out targeted treatment. Combined with sildenafil tablets the effect will be a little better.
In general, the effect of the drug is not certain for each person, and the patient’s age, cause of the disease and physical condition will be different. The drug should be applied under the guidance of a doctor.