4-FMB
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- no dose data
- 29 combo interactions documented
- 1 source
- no dose data
- 29 combo interactions documented
Summary
4-FMB is a stimulant cathinone. Reported effects include euphoria, color enhancement, time distortion, and wakefulness. Limited data is available on its dosage and safety profile.
Effect Profile
class estimateScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- No reports exist for this substance. Its effect list is the one shared by 13 other substances of the same class, so the scores below describe the class, not this compound.
- Weighted by importance: core (×3), major (×2), minor (×1)
Strong euphoria and anxiety/jitters with moderate focus and stimulation
Tolerance
Tolerance Decay
Acute tolerance: develops within a single session — the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
Effect glossary — · full glossary
Combinations
Cross-Check 4-FMB with another substanceHelpful Links
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