Sildalist Strong 140 mg is a medication that typically contains two active ingredients: sildenafil and tadalafil. Both sildenafil and tadalafil are phosphodiesterase type 5 (PDE-5) inhibitors used to treat erectile dysfunction (ED) in men. It works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. Similar to sildenafil, tadalafil also increases blood flow to the penis, but it has a longer duration of action. Tadalafil is known for its ability to provide an erectile response for up to 36 hours, earning it the nickname "the weekend pill."