This preference is the reason why a low-dose prescription of Tadalafil is the most popular way to manage the symptoms of ED. Sorry something went wrong with your subscription Please, try again in a couple of minutes Retry. Nitrates come as tablets, sublingual under the tongue tablets, sprays, patches, pastes, and ointments. When should I use Cialis? Click here for an email preview.We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, known as . Tadalafil (Cialis) is used to treat erectile dysfunction (ED, impotence; inability to get or keep an erection), and the symptoms of benign prostatic hyperplasia (BPH; an enlarged .  · Tadalafil works on the PDE5 enzyme in the lungs to relax the blood vessels. This will increase the supply of blood to the lungs and reduce the workload of the heart. .