<Tr> <Td> Anandamide reuptake inhibitors </Td> <Td> LY 2183240, VDM 11, AM 404 </Td> </Tr> <Tr> <Td> FAAH enzyme inhibitors </Td> <Td> MAFP, URB597, N - Arachidonylglycine </Td> </Tr> <Tr> <Td> Melanocortin receptor </Td> <Td> Melanocortin receptor agonists </Td> <Td> bremelanotide </Td> </Tr> <Tr> <Td> NMDA receptor </Td> <Td> NMDA receptor antagonists </Td> <Td> ethanol, ketamine, PCP, DXM, Nitrous Oxide, glutamate, memantine (used for moderate to severe Alzheimers) </Td> </Tr>

What are the three most common psychoactive drugs