Cialis is a long acting medication and can always be active. Both tadalafil and cialis otc are used to treat erectile dysfunction and benign prostatic hyperplasia (BPH), and enlargement of the prostate gland which can cause difficulty urinating. Tadalafil is the standard type of the brand Cialis. Both medications perform in your system. The FDA comes with an extremely rigorous process for reviewing medication until they hit on the market while some patients have been worried with how well tadalafil works. This procedure ensures that medications contain exactly the same active ingredients because of their brand-name counter parts, and in order that there are hardly any differences between these. If you've never tried Cialis earlier, your doctor will probably start you about a low dose, like 2.5 mg or 5 mg. The 20 mg pill may be your highest strength and it is not preferred because it has the potential to create erections which last a complete day. Some medications can interact with nutrients utilized in grapefruits, also tadalafil is one of them. Elements in grapefruits can change how these enzymes process medications and cause a build-up of tadalafil, although the active ingredient in Cialis, tadalafil, is separated in the liver by a select group of enzymes. This could boost your risk. Cialis is a kind of drug known as a PDE5 inhibitor that is used as a treatment for erectile dysfunction and benign prostatic hyperplasia. It is available in a number of different doses and may be obtained either daily or as-needed to get erectile dysfunction. It's very likely that most may have questions, as men are able to afford tadalafil and treat their own ED. Generic tadalafil is more than 50% cheaper than brand-name Cialis.