Sildenafil improves erectile dysfunction, not that the penis does not go soft after using the drug. The drug requires sexual stimulation to be effective and the penis will also soften after ejaculation.
Sildenafil has the effect of relaxing the smooth muscle of the blood vessels in the cavernous body, which increases blood perfusion and enhances erectile function. However, the use of this product only increases the hardness of the penis during erection, and the penis remains soft after ejaculation. Sexual stimulation is required for the drug to work, otherwise it will not be effective.
Adverse reactions to the use of sildenafil include flushing, dizziness, headache, dyspepsia, nausea, rash, visual abnormalities, etc. It is contraindicated for those who are allergic to the drug and cannot be used in combination with nitrate drugs.
It is recommended to use the drug under the guidance of a physician, and should not be used blindly.