Viagra is the trade name and generic name for sildenafil citrate tablets, which can be taken before or after bathing. Sildenafil citrate tablets are more commonly used for the treatment of erectile dysfunction, and when taking the medication for treatment, it can be taken at any time of the day or night, mainly within 0.5 to 4 hours before sexual activity. It is usually not restricted by bathing, so you can choose to take it before or after bathing. When using sildenafil citrate tablets, you need to pay attention to the fact that the drug may not work without sexual stimulation. During the period of medication you need to take it in conjunction with your health and choose to take it under the guidance of your doctor. Adverse reactions such as headache, indigestion, rash and dizziness may occur during the period of medication. The drug is not suitable for children, women and people who are taking nitrate drugs.