Cannabis & Viagra: two great tastes?

All the interwebs are buzzing (so to speak) about this particular tidbit that emerged recently: somebody seems to be spiking cannabis with libido enhancers!

Dries de Kaste and colleagues at the National Institute of Public Health and the Environment in Bilthoven, the Netherlands, analysed a liquid that police found being sold on the streets of Utrecht as a "marijuana adulterant".

They found compounds called homosildenafil (HS) and thiohomosildenafil (THS) in it, which belong to the same class of compounds as sildenafil, sold as Viagra. All three inhibit the breakdown of an enzyme that dilates blood vessels in the penis, increasing blood flow.

De Kaste does not know why HS and THS are being added to cannabis, but speculates that it could be to enhance the uptake of its psychoactive constituents, or to exploit a perception that marijuana use affects libido.

Wait, people are monkeying with drugs in order to exploit perceptions? Next you'll tell me dealers are coloring their meth pink in order to sell it to kids.