Tadact 20 mg does not contain sildenafil citrate. It contains tadalafil 20 mg, which is a different PDE-5 inhibitor used to treat erectile dysfunction (ED). Sildenafil is the active ingredient in medications such as Viagra and some generic sildenafil products. People who may benefit from Tadact 20 mg (tadalafil) include: Men with erectile dysfunction (ED): It helps achieve and maintain an erection when combined with sexual stimulation. Men who prefer a longer-lasting effect: Tadalafil can remain effective for up to 36 hours, offering more flexibility than Tadact 20 Mg , which typically lasts 4–6 hours. Men with ED related to conditions such as: Diabetes High blood pressure (if their doctor considers it safe) Mild to moderate cardiovascular disease Psychological factors such as performance anxiety (along with appropriate treatment if needed) Men with both ED and benign prostatic hyperplasia (BPH): Tadalafil is also approved in some formulations to improve urinary symptoms caused by an enlarged prostate. Who should avoid or use it only with medical advice? Tadalafil may not be suitable for people who: Take nitrate medications for chest pain. Have severe heart disease or have recently had a heart attack or stroke. Have very low blood pressure or uncontrolled high blood pressure. Have severe liver or kidney disease without appropriate dose adjustment.