Skip to main content

Loading page

Preparing public discovery modules

Still loading. If this does not resolve, refresh the page.

Formalised documentation of subjective effects. Not medical advice.

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

Loading mechanism route

Loading mechanism qualifiers and related substances

Still loading mechanism details. Refresh if this message stays visible.

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

Common5

Fentanyl
Heroin
Methadone
Morphine
Oxycodone

Phenylpropylaminopentane1

Tapentadol

Other opioids1

Tianeptine

Morphinan3

Codeine
Hydrocodone
Hydromorphone

Mechanism qualifier

μ-opioid receptor agonist (full)

28 substances

Dissociative

Arylcyclohexylamine1

3-HO-PCP

Opioid

Common6

Fentanyl
Heroin
Methadone
Morphine
Oxycodone
Tramadol

Phenylpropylaminopentane1

Tapentadol

Other opioids3

Lean
Tianeptine
U-47700

Anilinopiperidine2

Acrylfentanyl
Furanylfentanyl

Morphinan5

Codeine
Desomorphine
Hydrocodone
Hydromorphone
Oxymorphone

Morphinan (substituted)1

Ethylmorphine

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