Sildigra 250 is a brand name for sildenafil citrate, which is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED) in men. The typical dosage of sildenafil citrate for ED is in the range of 25 mg to 100 mg, with the most common doses being 25 mg, 50 mg, and 100 mg.