Vidalista 20mg is also used to treat the symptoms of benign prostatic hyperplasia (BPH). BPH is a condition in which the prostate gland becomes enlarged. Tadalafil can help men relieve their symptoms of BPH by relaxing the muscles in the prostate. By improving blood flow to the prostate, tadalafil helps men pass urine more easily. Tadalafil is contraindicated when used in combination with cyclosporine, letermovir, or telaprevir. Tadalafil is generally safe for erectile dysfunction when given in low doses once a day. A single dose of tadalafil for erectile function should not exceed 2.5 mg daily.