Sildalist Strong 140 mg is a medication that combines two active ingredients: Sildenafil Citrate (100 mg) and Tadalafil (40 mg). Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED) in men. It works by increasing blood flow to the penis during sexual stimulation, aiding in achieving and maintaining an erection. Tadalafil is also a PDE5 inhibitor used to treat erectile dysfunction (ED). It works similarly to Sildenafil by enhancing blood flow to the penis, but it has a longer duration of action compared to Sildenafil, lasting up to 36 hours.