Also, like Viagra, sildenafil is available through Hims in doses of 25, 50, and 100 mg. You can take it as needed in advance of sexual activity and should not take it more than once per day.

It’s available in a 25-, 50-, and 100-milligram (mg) oral tablet. Sildenafil is the generic form of Viagra and is the primary active ingredient found in Revatio and Viagra. Sildenafil works ...