Tadalista 20 mg is a tadalafil-containing medicine used to treat erectile dysfunction (ED) in adult men. Tadalafil belongs to the phosphodiesterase type 5 (PDE5) inhibitor class. It works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. For ED, 10 mg is generally the recommended starting as-needed dose, while 20 mg may be used when a healthcare professional determines that a higher dose is appropriate. It should generally not be taken more than once a day. Tadalafil does not increase sexual desire and does not produce an erection without sexual stimulation.