Tadalafil may cause side effects. Other uses for this medicine This medication may be prescribed for other uses; ask your doctor or pharmacist for more information. BPH is caused by an enlarged prostate. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Brand names Why is this medication prescribed?Cialis (Tadalafil) online without a prescription, available in 40mg packs of 4 or 8 tablets to help you regain your confidence! All orders will be sent directly to your home in discreet packaging. Buy online today. It is the brand name for tadalafil, a medication also used to treat ED. Tadalafil is in a class of drugs called phosphodiesterase-5 (PDE5) inhibitors and is available in a generic form . Cialis is used to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate). Another brand of tadalafil is Adcirca, which is used to .