Sildalist Strong 140 mg is a combination product commonly marketed for erectile dysfunction (ED). Products sold under this name may contain sildenafil and tadalafil, two PDE-5 inhibitors, with the exact amounts depending on the manufacturer and formulation. Both ingredients work by increasing blood flow to the penis during sexual stimulation. They do not normally produce an erection without sexual stimulation. Because this product may combine two medicines from the same therapeutic class, it should not be used casually or combined with other ED medicines. Taking multiple PDE-5 inhibitors can increase the risk of low blood pressure, dizziness, headache, flushing, and other adverse effects.