There are minor differences in how each drug works and how long it works, though Viagra, Cialis, Levitra online have similar mechanisms. Levitra works for as long as 5 hours while Viagra lasts for about 4 hours, however, they both function around the 30 minutes from ingestion. Cialis, on the other hand, functions fast enclosed in 15 minutes and the results lasts much longer, which could sometimes last for up to 36 hours. Therefore, if one drug doesn’t work for you, you can try another one but you require to bear in mind that they have the same makeup so chances are tight that the next drug will have any effect.

You can buy Viagra, Cialis, Levitra online at Internet-based pharmacies. In order to be precise that you are buying it from a legitimate site, do some research and make sure that the drugs for sale are effective and real. Take your time in doing research and don’t just jump into the bandwagon. As long as you are aware of the drugs limitations and uses, then you can determine if it’s the right drug you should be using for your erection problems.