Tadalista Professional is a product marketed for men experiencing erectile dysfunction (ED). It is commonly associated with tadalafil, a phosphodiesterase type-5 (PDE5) inhibitor. Because branded products can vary between markets, the exact active ingredient and strength should always be confirmed on the product packaging before use. Tadalafil works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. It does not increase sexual desire and does not normally cause an erection without sexual stimulation.