Sildalist Strong 140 mg is a medication used to treat erectile dysfunction (ED) in men. It combines two active ingredients: sildenafil citrate and tadalafil. Sildenafil citrate is the active ingredient in Viagra, while tadalafil is the active ingredient in Cialis. Both sildenafil and tadalafil belong to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors.