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Formalised documentation of subjective effects. Not medical advice.

Content is licensed under CC BY-NC-SA 4.0 for non-commercial reuse with attribution.

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μ-opioid receptor agonist

33 substances share this mechanism of action.

μ-opioid receptor agonist (General (no qualifier))16 μ-opioid receptor agonist (full)28 μ-opioid receptor agonist (partial)3

Mechanism qualifier

μ-opioid receptor agonist (general)

16 substances

Psychedelic

Tryptamine1

Ibogaine

A-typical Hallucinogen

Salvia

Dissociative

Common1

Ketamine

Miscellaneous

Dihydrocodeine
Isomethadone
O-Desmethyltramadol

Opioid

Common6

Codeine
Fentanyl
Heroin
Methadone
Morphine
Oxycodone

Morphinan2

Hydrocodone
Hydromorphone

Other opioids2

Tapentadol
Tianeptine

Mechanism qualifier

μ-opioid receptor agonist (full)

28 substances

Dissociative

Arylcyclohexylamine1

3-HO-PCP

Opioid

Common7

Codeine
Fentanyl
Heroin
Methadone
Morphine
Oxycodone
Tramadol

Morphinan4

Ethylmorphine
Hydrocodone
Hydromorphone
Oxymorphone

Fentanyl analogues3

Acetylfentanyl
Acrylfentanyl
Furanylfentanyl

Other opioids4

Lean
Tapentadol
Tianeptine
U-47700

Miscellaneous

4-Fluorobutyrfentanyl
Butyrfentanyl
Dihydrocodeine
Isomethadone
Methoxyacetyl-Fentanyl
Nicomorphine
O-Desmethyltramadol
Parafluorofentanyl
Valerylfentanyl

Mechanism qualifier

μ-opioid receptor agonist (partial)

3 substances

Opioid

Common1

Kratom

Morphinan2

Buprenorphine
Hydromorphone