BPH occurs when the prostate and the surrounding tissues become enlarged. Though this growth is not cancerous, prostate cancer and BPH can co-occur. National Library of Medicine. Four strengths of almond-shaped tablets are available in different sizes and different shades of yellow: 2. However, eating food, particularly high-fat food, can reduce the effectiveness of Viagra. An erection will not occur just by taking a pill.Cialis is a prescription drug used to treat erectile dysfunction and benign prostatic hyperplasia. Learn how to lower long-term drug costs and more. Cialis (tadalafil) is an oral medication that treats erectile dysfunction (ED). One dose of Cialis lasts longer than a dose of the well-known Viagra (sildenafil). You can take Cialis when you need it, typically 30 minutes before sex. If that doesn’t work for you, another option is taking a low-dose pill every day for ongoing erectile support. Tadalafil, or generic Cialis, is most commonly used to treat erectile dysfunction (ED). However, it’s also used to treat benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension.