Levitra is a brand name for a substance with the generic name vardenafil. It is used to treat men who experience difficulty having and maintaining an erect penis for satisfactory sexual performance.
It was approved by the FDA on August 20, 2003 and first marketed by Bayer Pharmaceuticals, GlaxoSmithKline, and Schering-Plough.
The average initial dose of levitra is 20-40 milligrams. As far as chemical structure goes, levitra is very similar to viagra.
The main difference being the position of a nitrogen atom, and with viagra the change of the piperazine ring methyl group to an ethyl group.
Both the effects of levitra and viagra last about 4-6 hours, and the per dose cost of each medication at most pharmacies is comparable.
Since both medications are so similar, a good idea would be to purchase whichever is cheaper. If one of these medications does not work for you, the is a slight chance the other might.
Levitra is the brand name of a product Bayer Pharmaceuticals, GlaxoSmithKline, and Schering-Plough chose to market a chemical called vardenafil.
Because it is a brand name, no one other than the owner of the brand name, or an entity authorized by the owner, is legally allowed to market a product called levitra.
The term generic levitra is used to refer to products that are chemically identical to levitra, but sold under another name like generic levitra, vardenafil, or another name chosen by the company that sells it.
Generic levitra works like brand name levitra because they are the same amount of the same active ingredient, sold in different packaging with different names.
When ingested for maintaining an erection for satisfactory sexual performance, 20 milligrams of generic levitra will work just like 20 milligrams of brand name levitra.
Generic levitra should be taken 60 minutes or longer before sexual activity, and is effective for 4 to 6 hours in most users.
If you follow the same precautions when using generic levitra as you would with brand name levitra, it will produce the same results.
20 milligrams is the recommended standard levitra dose size for most individuals, but some men might require a larger 40 mg dose.
Alcohol and fatty foods can limit the effectiveness of levitra, and should be avoided when levitra is being consumed. For best results on your first attempt, try levitra on an empty stomach, or with a small low-fat meal.
Medications like levitra, viagra, and cialis work by inhibiting a chemical called phosphodiesterase type 5. Because of their mode of action, these drugs are commonly referred to simply as PDE5 inhibitors.
When a man gets sexually excited, it triggers cells in the penis to produce nitric oxide. The increase in nitric oxide will in turn cause production of cyclic guanosine monophosphate (cGMP).
The cGMP causes arteries in part of the penis to relax and allow more blood to flow through them. The increase in blood flow causes an erection.
If the enzyme phosphodiesterase type 5 (PDE5) is of sufficient quantity, it will attack the cGMP and erection will not be maintained.
Levitra and other PDE5 inhibitors reduce the amount of PDE5 available to attack cGMP. With a reduction of PDE5, most men are able to maintain an erection to orgasm.