Sildenafil (aka Viagra) is a phosphodiesterase 5 (PDE5) inhibitor which increase cyclic guanosine monophosphate (cGMP) concentrations in the intracellular pathway activated by N-methyl-d-aspartic acid receptors which is believed to mediate long-term potentiation and memory consolidation.
Here are a few links for further reading.
http://www.nootropic...fil/memory.html
http://cat.inist.fr/...cpsidt=18904131
http://www.sciencedi...c1911c90b0e0dcf
Has anybody who is using viagra for other purposes noticed any effects in regards to learning and memory?
Edited by Aphrodite, 03 October 2009 - 10:47 PM.