Malegra 25 mg works by triggering a response in the body's sildenafil citrate receptors. This increases the levels of cGMP in the cavernous body of the penis, which relaxes smooth muscles and improves circulation. The drug's full-flow rate produces lasting erections lasting up to 4 hours. To get the most out of Malegra 25, it should be taken about an hour before sexual activity. For more information visit: Medzsite