mikey.addz asked:


I am applying for a medical trial and we arnt allowed to use any medications.. but ive been having some extra fun with sildenafil/viagra . I dont want the drug showing up on my screening, cant find any answers on the net.

Martin asked:


How was the compound Sildenafil Citrate (Viagra) found and what was it extracted from?
Are Tadalafil Citrate (Cialis) and Vardenafil HCL (Levitra) extracted from the same plant source as Viagra is?

Daniel R asked:


As a bonus for my Organic Class, I am looking for a detailed mechanism for the synthesis of Benzene to Sildenafil Citrate (Viagra) or the synthesis of Benzene to tadalafil (Cialis). I am trying to find a link to the detailed mechanism, or at least one that is very close.