Sildamax is a medicine used to treat erectile dysfunction and other impotence problems. Sildenafil Citrate, the active ingredient in Sildamax, is the same active ingredient found in Viagra. It works by relaxing blood vessels which help increase blood flow in the genitals. Sildenafil (Generic Viagra) is the active ingredient of Sildamax 100mg, which may be purchased online from trustworthy licensed suppliers like e-Surgery. e-Surgery online also sells Viagra and Viagra connect tablets.