Tramadol

tram

A synthetic opioid analgesic, tramadol is used to treat moderate pain and can be considered a medium-strength opioid. Tr...

U-47700

u47700

A µ-opioid receptor agonist that is related to AH-7921. Having a very short duration....

U-49900

A substance that is an analogue of U-47700, yet doesn't share much with it. If you are interested in trying it, I recomm...

U-51754

methene-u47700, methene-u-47700

A very potent opioid, that seems to have a fair bit of κ-opioid action. So Dyshopria, Auditory hallucinations can be an ...

Valerylfentanyl

vf

Opioid that is a higher homologue of Butyrfentanyl with greatly reduced potency....

W-15

A potent opioid that is 5.4x more potent than Morphine. Has a distinct structure unrelated to nearly all other opioid co...