Tadalafil is not usually used to treat benign prostate enlargement because there is not enough evidence about how well it works. You can only get it on prescription for erectile dysfunction if you have a specific condition such as multiple sclerosis or a spinal cord injury. Most erectile dysfunction medications belong to the drug class known as PDE5 inhibitors , which help relax the muscles and increase blood flow to allow for a full erection. How can I buy tadalafil? The most common side effects are headaches, feeling sick, indigestion and facial flushes. However, because sexual stimulation is required to initiate the local penile release of nitric oxide, tadalafil’s inhibition of PDE5 will have no effect without sexual stimulation. If you become pregnant while taking tadalafil, call your doctor.Tadalafil (Cialis) is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). Tadalafil works by helping to relax the blood vessels in the penis, allowing blood to flow into the penis, and causing an erection. Cialis (tadalafil) is a popular medication used to treat erectile dysfunction. It’s available in tablets ranging from mg to 20mg. It can cost more than $ for a month’s supply, depending on the dosage you need and the pharmacy you visit. You can save more than 90% on the average retail price at certain pharmacies by using a GoodRx coupon. AdFree & Private Online Consultant with Real Doctors. Reliable E.D. Meds Shipped Discreetly. If appropriate, get a prescription for ED from Rex et Packaging · Personalized Plan · Real Doctors · Free ShippingSexual health: Premature Ejaculation · Erectile Dysfunction · Breakouts.