Cialis 20 mg (Tadalafil) is prescribed to address male sexual function issues like impotence or erectile dysfunction (ED) by enhancing blood flow to the penis during sexual stimulation. Additionally, it is utilized to manage benign prostatic hyperplasia (BPH) symptoms, including an enlarged prostate. Tadalafil helps alleviate BPH symptoms like poor urine flow, difficulty initiating a urine stream, and frequent or urgent urination (especially at night) by relaxing the smooth muscles in the bladder and prostate. It is important to note that tadalafil does not prevent sexually transmitted infections such as syphilis, hepatitis B, and HIV. To prevent STIs, practice safe sex methods like using latex condoms. Consult your healthcare provider for more information.