Sildalist Strong 140 mg is marketed as a combination of sildenafil 100 mg tadalafil 40 mg, two PDE-5 inhibitors used for erectile dysfunction (ED). Product listings consistently identify this 140 mg formulation as containing these two active ingredients. Sildenafil and tadalafil both increase blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. They do not increase sexual desire and do not cause an erection without arousal.