4-HO-MPT

4-Hydroxy-N-methyl-N-propyltryptamine (also known as 4-HO-MPT or Meprocin) is a novel synthetic psychedelic substance of the tryptamine chemical class that produces psychedelic effects when administered. It is a closely related structural analog of 4-HO-DMT (Psilocin) and other hallucinogenic tryptamines with powerful psychedelic effects.

Classification

Chemical: Tryptamine
Psychoactive: Psychedelic
Tag: Research-Chemical
Tag: substituted tryptamine
Tag: Tentative

Effects

Nausea
Spontaneous Bodily Sensations
Pupil Dilation
Increased Heart Rate
Brightness Alteration
Stimulation
Depth Perception Distortions
Perspective Distortion
Novelty Enhancement
Time Distortion
Conceptual Thinking
Thought Loop
Auditory Hallucination
Auditory Distortion
Pattern Recognition Enhancement
Diffraction
Tracers
Symmetrical Texture Repetition

Routes of Administration

Oral

Dosage

Common: 10-15 mg
Light: 5-10 mg
Strong: 15-25 mg
Threshold: 5 mg
Heavy: 50 mg

Duration

Onset: 0.3-1 h
Comeup: 1-2 h
Peak: 2-3 h
Offset: 1-2 h
After Effects: 2-12 h

Vapourized

Dosage

Common: 5-10 mg
Light: 3-5 mg
Strong: 10-15 mg

Duration

No data available for this section yet.

Harm Reduction

Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.

Sources

Substance data is aggregated from the following public harm-reduction and reference sources.

Links

This static page is intended as a readable non-JS and prerender-friendly library export.

Get the full DrugsPRO experience

Open the interactive DrugsPRO app for search, saved items, interactions, and deeper harm reduction tools.

Get the PRO test kit. The simple, quick and reliable drug checking test kit. Visit https://protestkit.eu