Library
4-HO-McPT
4-HO-MPT is a research chemical with very little history of human usage and minimal scientific data on its pharmacology, metabolism, and toxicity. Legal status varies by jurisdiction; it is unscheduled in most countries but is a Class A drug in the United Kingdom under the tryptamine catch-all clause and controlled under Germany's NpSG. Use precise scales for dosing as potency varies between salt forms (freebase is approximately 25% more potent than fumarate salts). Individuals with personal or family histories of mental illness should avoid use.
Also known as: Meprocin, 4-hydroxy-mcpt
Classification
- Chemical: Tryptamine
- Psychoactive: Psychedelic
- Tag: Research-Chemical
- Tag: Synthetic
- Tag: Tentative
Effects
- Sedation
- Physical Euphoria
- Bodily Pressures
- Nausea
- Increased Heart Rate
- Pupil Dilation
- Thought Connectivity
- Analysis Enhancement
- Time Distortion
- Emotion Enhancement
- Anxiety
- Depth Perception Distortions
- Bodily Control Enhancement
- Color Enhancement
- Pattern Recognition Enhancement
- Music Enhancement
- Color Shifting
- Symmetrical Texture Repetition
Routes of Administration
Oral
Dosage
- Threshold: 5 mg
- Light: 10-15 mg
- Common: 15-25 mg
- Strong: 25-35 mg
- Heavy: 35+ mg
Duration
- Onset: 0.33-0.67 h
- Comeup: 0.5-1 h
- Peak: 2-3 h
- Offset: 0.5-1.5 h
- After Effects: 0.5-2 h
- Total Duration: 1.5-4 h
Insufflated
Dosage
- Threshold: 5 mg
- Light: 10-20 mg
- Common: 20-30 mg
- Strong: 30-45 mg
- Heavy: 45 mg
Duration
- Onset: 0.08-0.25 h
- Comeup: 0.25-0.5 h
- Peak: 0.75-1.5 h
- Offset: 0.25-0.75 h
- After Effects: 0.25-1 h
- Total Duration: 1-2.5 h
Vaporized
Dosage
- Threshold: 3 mg
- Light: 3-5 mg
- Common: 5-10 mg
- Strong: 10-15 mg
- Heavy: 15 mg
Duration
- Onset: 0.02-0.05 h
- Peak: 0.17-0.5 h
- Offset: 0.25-0.75 h
- After Effects: 1-6 h
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.
