Sexual activity may be a strain on your heart, especially if you have heart disease. What Is Cialis? Take tadalafil exactly as directed. If you have certain health conditions or are taking certain medications, your doctor may tell you to take tadalafil less often or may prescribe a lower dose to be taken once a day. This medicine Tadalafil 20 mg is used in treating patients who are suffering from impotency related and erectile dysfunctional issues as well. If you are taking tadalafil on a regular schedule, take it at around the same time every day.Promotion disclosure info Save up to 97% on tadalafil cialis with GoodRx Different pharmacies offer different prices for the same medication. GoodRx helps find the best . Both Cialis and tadalafil treat ED at the following doses: mg. 5 mg. 10 mg. 20 mg. At 20 mg, both drugs are also approved to treat symptoms of benign prostatic hyperplasia (BPH), such as difficulty urinating. They work by relaxing the muscle cells in the prostate, allowing urine to flow out of the bladder. The cost of tadalafil without insurance starts at $* for 20mg and 30 tablets using an RxSaver coupon. If you’re prescribed tadalafil to treat erectile dysfunction or to alleviate .