Sildigra is a popular brand of sildenafil citrate, the active ingredient also found in Viagra. Sildenafil works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which helps relax blood vessels in the penis and increases blood flow. This improved circulation enables men to achieve and maintain an erection during sexual stimulation. Sildigra 250 mg is considered a high-dose option, with common starting doses usually being 25 mg, 50 mg, or 100 mg. The medication is effective for treating Erectile disorder regardless of its cause, including ED related to low testosterone levels.