Click Here To Buy Now Cialis 5 mg is a lower dose of the medication compared to the 10 mg and 20 mg options. It’s commonly prescribed for daily use to treat erectile dysfunction (ED) or benign prostatic hyperplasia (BPH). The idea behind the daily use of a lower dose is to maintain a more consistent level of the medication in your system, which can help achieve better spontaneous sexual activity or alleviate BPH symptoms.