In general I don't read junk mail, however I had heard on-line pharmacies were easy to order from. So, one day I decide to click the link to the online pharmacy adivertisement jumbled amongst the rest of the spam in my e-mail folder.
Benzphetamine
Encyclopedic
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 18 combo interactions documented
- PubChem toxicity data
- dose data not in PW/TripSit (unverifiable)
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 18 combo interactions documented
- PubChem toxicity data
- dose data not in PW/TripSit (unverifiable)
Aliases: Didrex, Regimex, Inapetyl
Summary
Benzphetamine is prescribed as a short-term appetite suppressant for obesity management. As a prodrug, it metabolizes into amphetamine and methamphetamine in the body, producing stimulant effects. Contraindicated in individuals with cardiovascular disease, moderate to severe hypertension, hyperthyroidism, glaucoma, or history of substance abuse.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 25-50mg | 50-100mg | 100-150mg | 150mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Peak | Offset | Total |
|---|---|---|---|---|
| Oral | 30-60 min | 2-4 hrs | 4-8 hrs | 8-12 hrs |
Effect Profile
4 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Stimulant
5.9
Strong
6/10
Strong anxiety/jitters and focus with moderate euphoria, mild stimulation
Stimulation / Energy
×3
5
stimulation
wakefulness
Euphoria / Mood Lift
×2
7
physical euphoria
cognitive euphoria
motivation enhancement
Focus / Productivity
×2
9
focus enhancement
analysis enhancement
motivation enhancement
thought acceleration
Anxiety / Jitters
×1
10
anxiety
restlessness
increased heart rate
teeth grinding
vasoconstriction
Based on reports from:
Tolerance
Build-up
develops over days to weeks of regular use
Reset
3–7 days for acute; 1–3 weeks for full reset
Tolerance Decay
Half tolerance
3d
Baseline
~21d
Tolerance to anorectic and euphoric effects develops quickly (days–weeks) with repeated use; cross-tolerance likely across amphetamine-class stimulants. Empirical timelines vary; conservative spacing (≥2–3 weeks) reduces rapid tolerance escalation.
Effects
Aggregated from 4 Erowid experience reports
Positive Effects 1
Stimulation
75.0%
70%
Adverse Effects 0
Combinations
Cross-Check Benzphetamine with another substanceCommunity Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance.
Erowid 1 report 1 neutral visit
Pill Identifiers
8
known pill identifiers on record — view imprints, colors, shapes, and images
→
Benzphetamine's nerd page
Pharmacology, chemical data, effect profiles, and more
→
Helpful Links
Report an issue or suggest an edit
Spotted incorrect or dangerous information, have a correction, a new study, or a useful addition for Benzphetamine? Let us know. Reports are reviewed by moderators — this is not posted publicly.