Viagra is the trade name, generic name of sildenafil citrate tablets, most patients take the drug for a period of time in the sexual stimulation of the penis can maintain level 4 hardness.
Sildenafil citrate tablets belong to type 5 phosphodiesterase inhibitors, suitable for the treatment of erectile dysfunction, taking the drug can play a certain role in improving the hardness of penile erection. And grade 4 hardness generally refers to the hardness of the penis during normal erection, therefore, after taking the drug for a period of time, most patients can maintain grade 4 hardness under sexual stimulation.
Sildenafil citrate tablets can have some adverse reactions during administration, such as dizziness, nausea, vomiting, small tiger dysphoria, nasal congestion, etc. The severity of the adverse reactions increases with the increase of the dose.
Sildenafil citrate tablets may enhance the antihypertensive effect of nitrate. Therefore, it is contraindicated in patients taking any dosage form of nitrate, either regularly or intermittently. Sildenafil is contraindicated in combination with guanylate cyclase agonists (e.g., leucovorin) to avoid symptomatic hypotension.
Sildenafil citrate tablets should always be taken under the supervision of a physician. If you are taking other medications at the same time, you should consult your doctor in advance and be aware of any changes in your body while taking them.