While all three of these leading ED drugs are PDE5 inhibitors, there are some minor differences between Viagra, Cialis, Levitra. Viagra was the first ED drug and is considered to be the strongest however it only lasts about 4-5 hours in the system. Cialis is the newest of the ED drugs and touts a hefty 24-36 hour presence in the system, while Levitra falls in between Cialis and Viagra, while kicking in fast and lasting roughly 4-8 hours or more. Also, Generic Levitra online has been shown to work for many ED patients when these other two ED drugs have not. Bayer recently announced that they plan to release a new version of their popular erectile dysfunction medication, Levitra. The new Orodispersible tablets called Staxyn, the same effects as the current Levitra tablets, except they can be dissolved in the mouth. Click here to purchase Staxy online, the all-new dissolvable tablet from Bayer. Levitra comes as 20 mg pill. The recommended initial dosage is 10 mg. It should be taken an hour before intercourse. If there are no side effects you dosage can be increased up to 20 mg. You shouldn’t take more that 1 pill per day. This medication has been shown to be effective within 15 minutes of taking the tablet, and lasts up to 10 hours later. Before starting your treatment with Levitra you should tell your doctor about all the conditions you may have and especially about the following: kidney or liver problems, a bleeding disorder, stomach ulcer, or retinitis pigmentosa, allergic reaction to any medicine, deformation of the penis such as angulation, cavernous fibrosis (Peyronie’s disease), sickle-cell anemia, multiple myeloma, leukemia. Because alcohol can make it more difficult to get an erection, do not drink large amounts of alcohol before sexual activity.