Sildalist Strong 140 mg is a medication used to treat erectile dysfunction (ED) in men. It contains two active ingredients: sildenafil citrate (the same active ingredient found in Viagra) and tadalafil (the active ingredient in Cialis). Both sildenafil and tadalafil belong to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors, which work by increasing blood flow to the penis during sexual stimulation, thus helping to achieve and maintain an erection.