After taking sildenafil you can soften an erect penis by waiting for the drug to wear off and by ejaculating during intercourse. The main function of sildenafil is to treat erectile dysfunction in men, and the effect of the drug usually wears off on its own after two hours, which varies from person to person. Or when a man completes an ejaculation, it will soften, if the erection lasts for more than two hours, has not softened, and the male penis is engorged with blood and purple, it is usually difficult to eliminate by itself, and you need to go to the hospital in time to consult a doctor. Dizziness, nausea, blurred vision and other symptoms may occur after taking the drug, which usually disappears on its own. The drug is forbidden to be combined with nitrate drugs, and is contraindicated for women, people who are allergic to the product, children, and people whose recent cardiovascular state makes it inadvisable for them to have sex. The drug should be taken correctly according to the dosage under the guidance of a doctor, to avoid taking it without authorization and causing unnecessary damage to the body. If there are any uncomfortable symptoms, you need to go to the hospital in time.