4-BA
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- duration data present
- 18 combo interactions documented
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
- 1 source
- duration data present
- 18 combo interactions documented
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
Aliases: Pba, 4-br-amp
Summary
para-Bromoamphetamine is a substituted amphetamine with stimulant and entactogenic properties that is highly neurotoxic to serotonergic neurons. Research shows it depletes brain serotonin for at least a week after administration, similar to para-chloroamphetamine. It acts as a weak MAO-A inhibitor, adding additional risks when combined with other serotonergic substances.
Dose Information
| ROA | Threshold |
|---|---|
| Oral | 5mg |
Only a threshold dose is documented for this substance — the smallest amount with a noticeable effect. There is no published light/common/strong ladder to show above it.
Onset, Duration & After-effects
| ROA | Onset | Peak | Offset | Total |
|---|---|---|---|---|
| Oral | 20-60 min | 1-3 hrs | 2-4 hrs | 3.33-8 hrs |
Effect Profile
Scores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Strong euphoria with moderate stimulation and sensory enhancement, mild empathy
Strong anxiety/jitters and euphoria with moderate stimulation
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track 4-BA there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:
4-BA Source: SubstanceSearch (substancesearch.com) Oral dose (mg): threshold 5 Oral duration: onset 0.33-1h · peak 1-3h · offset 2-4h · total 3.33-8h Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.
The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.
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
- Stimulation
- Physical euphoria
- Insomnia
- Increased heart rate
- Temperature regulation suppression
- Teeth grinding
- Pupil dilation
- Vasoconstriction
- Increased perspiration
- Neurotoxicity symptoms
- Mood lift
- Empathy enhancement
- Increased sociability
- Alertness enhancement
- Cognitive euphoria
- Wakefulness
- Anxiety
- Motivation suppression
- Thought deceleration
- Talkativeness
- Tactile enhancement
- Increased music appreciation
- Increased libido
- Tracers
- Color enhancement
- Pattern recognition enhancement
- Appetite suppression
- Light sensitivity
- Dehydration
- Disinhibition
Combinations
Cross-Check 4-BA with another substanceHelpful Links
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