What is LSD?
LSD (lysergic acid diethylamide) is a potent psychedelic compound discovered in 1938 by Albert Hofmann. It is one of the most potent psychoactive substances known — active doses measured in micrograms (millionths of a gram). LSD is typically taken orally and produces profound alterations in perception, mood, thought, and sense of self.
Street Names:
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Acid
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Lucy
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Tabs
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Blotters
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Gel tabs (gelatin squares)
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Microdots (tiny pills)
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Hard gels (gelatin capsules containing liquid LSD)
LSD Dosage (Micrograms):
| Dose | Effect Level | Typical Experience |
|---|---|---|
| 20-50 ug | Low (microdose) | Subtle mood lift, slight visual changes |
| 50-100 ug | Standard | Full psychedelic effects, visuals, altered thinking |
| 100-150 ug | Strong | Intense visuals, ego softening |
| 150-200 ug | Very strong | Ego dissolution possible |
| 200-300 ug | High | Profound ego dissolution, loss of reality contact |
| 300-400 ug | Very high | Complete ego loss, mystical experiences |
| 220 ug | High to very high | Intense, not for inexperienced users |
| 400+ ug | Heroic | Overwhelming for most users |
Hard Gel Capsules (dosage form):
Hard gel capsules containing LSD typically hold liquid LSD dissolved in a carrier (water, alcohol, or propylene glycol). Advantages from a manufacturer/user perspective (educational only):
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More precise dosing than blotter paper
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Less degradation from light/air than blotter
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Easier to swallow
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Harder to detect visually
Risks of 220ug hard gel capsules:
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Extremely potent — can produce overwhelming experiences
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Hard gel may appear identical to other drugs (e.g., MDMA capsules) — misidentification risk
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Delayed onset if capsule dissolves slowly (may cause redosing)
LSD Gel vs. Blotter vs. Liquid (Educational Comparison):
| Form | Appearance | Dose per unit | Typical dose range | Onset |
|---|---|---|---|---|
| Blotter paper | Small square paper (1/4″) | 50-200 ug | 1-2 hits | 30-60 min |
| Gel tabs | Small gelatin squares | 100-300 ug | 1 square | 30-60 min |
| Hard gel capsule | Gelatin capsule containing liquid | 100-300 ug | 1 capsule | 30-90 min (depends on dissolution) |
| Microdots | Tiny pill/tablet | 50-150 ug | 1 pill | 30-60 min |
| Liquid | Dropper bottle | Variable (drops) | 1-2 drops | 15-30 min (sublingual) |
How LSD Works (Mechanism of Action):
LSD is a potent agonist at serotonin 5-HT2A receptors in the brain. This receptor activation leads to:
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Increased connectivity between normally unconnected brain regions
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Reduced activity in the default mode network (DMN) — responsible for sense of self, ego)
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Altered sensory processing, perception, mood, and cognition
Immediate Effects (6-12 hours duration):
| Effect Type | Description |
|---|---|
| Visual | Geometric patterns, tracers, color enhancement, breathing/morphing surfaces |
| Cognitive | Altered time perception, creative/insightful thinking, magical thinking |
| Emotional | Euphoria, awe, anxiety, fear (bad trip), emotional lability |
| Sensory | Synesthesia (“hearing” colors, “seeing” sounds), enhanced touch/taste |
| Ego effects | Ego softening → ego dissolution → ego loss (dose-dependent) |
Physical Effects:
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Dilated pupils
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Increased heart rate, blood pressure
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Increased body temperature (mild)
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Sweating or chills
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Tremors, muscle weakness
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Nausea (especially on come-up)
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Difficulty sleeping for 12-24 hours
Risks of High-Dose LSD (200ug+ including 220ug):
| Risk | Description |
|---|---|
| Bad trip | Severe anxiety, panic, fear of death, paranoia, terrifying hallucinations |
| Psychosis | In predisposed individuals (personal or family history of schizophrenia/psychosis) |
| Ego dissolution | Loss of sense of self — can be therapeutic or terrifying |
| Prolonged duration | Effects last 12+ hours at high doses (exhausting, distressing) |
| Flashbacks (HPPD) | Hallucinogen Persisting Perception Disorder — rare but possible |
| Accidents | Impaired judgment, coordination — falling, drowning, walking into traffic |
| Suicidal behavior | During severe bad trips (rare but documented) |
Can you overdose on LSD?
| Question | Answer |
|---|---|
| Fatal overdose from LSD alone | Extremely rare (no known documented case of death solely from LSD toxicity) |
| Death from behavior during trip | Yes (accidents, suicide, dangerous behavior) |
| Death from adulterated product | Possible (e.g., NBOMe compounds sold as LSD — fatal at much lower doses) |
| Physical toxicity | Very low — therapeutic index estimated >1000 (would require massive quantity) |
Signs of LSD Emergency:
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Extreme agitation, violence, or aggression
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Self-harm or suicidal statements
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Psychosis (inability to distinguish reality from hallucination)
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Seizures
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Hyperthermia (dangerously high body temperature)
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Loss of consciousness
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Persistent vomiting
Emergency Response for a Bad Trip:
| Do This | Avoid This |
|---|---|
| Stay calm, speak softly | Panic or yell |
| Move to quiet, low-stimulation environment | Take to crowded/loud place |
| Reassure (“this will pass, you’re safe”) | Argue about reality |
| Offer water (if conscious) | Force anything by mouth |
| Call 911 if danger to self/others or medical emergency | Leave them alone |
| If unknown substance (possible NBOMe or other), treat as medical emergency | Assume it’s “just acid” |
Tolerance and Dependence:
| Property | Assessment |
|---|---|
| Tolerance | Builds extremely rapidly (after 1 dose); requires 7-14 days to return to baseline |
| Cross-tolerance | With psilocybin, mescaline, DMT, other 5-HT2A agonists |
| Physical dependence | None — no withdrawal syndrome |
| Psychological dependence | Low — not considered addictive |
| Rebound effects | None |
N-BOMe Warning (Critical Safety Information):
⚠️ FATAL OVERDOSE RISK: Some “LSD” sold on the illicit market is actually NBOMe compounds (25I-NBOMe, 25C-NBOMe, 25B-NBOMe). NBOMes are fatal at milligram doses (1-10mg vs. LSD’s microgram active dose). NBOMe has caused numerous deaths. Hard gel capsules do not guarantee the substance is LSD. Bitter/metallic taste = NBOMe (LSD is tasteless). Spit it out if bitter.
Drug Interactions:
| Drug Class | Interaction | Risk |
|---|---|---|
| SSRIs/antidepressants | Diminished LSD effects | Moderate (not dangerous but may be ineffective) |
| MAO inhibitors | Potentially intensified/prolonged effects | Moderate |
| Lithium | Increased risk of seizures, psychosis | High |
| Alcohol | Intensified confusion, poor judgment | Moderate |
| Other psychedelics | Intensified effects | Moderate |
Pregnancy and Breastfeeding:
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Pregnancy: No human studies. LSD is not recommended. May cause uterine contractions.
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Breastfeeding: LSD likely passes into breast milk. Not recommended.
Legal Status:
| Jurisdiction | Classification | Penalty (possession) |
|---|---|---|
| United States (federal) | Schedule I | Up to 1 year imprisonment + fine |
| United Kingdom | Class A | Up to 7 years imprisonment + unlimited fine |
| Canada | Schedule III | Up to 3 years imprisonment |
| Australia | Schedule 9 | Up to 2 years imprisonment + fine |
Clinical Research Context (Educational):
LSD is being studied in limited clinical trials for:
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End-of-life anxiety (cancer patients)
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Alcohol use disorder
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Cluster headaches (off-label)
Important: These are clinical trials only — not approved medical use. LSD remains Schedule I outside of tightly controlled research settings.
Harm Reduction Information (Educational Only):
For individuals who choose to use despite legal and health risks:
| Recommendation | Rationale |
|---|---|
| Test your substance | Reagent tests (Ehrlich, Hofmann) can identify LSD vs. NBOMe |
| Start low (50-100ug first time) | 220ug is too high for inexperienced users |
| Have a sober trip sitter | Someone to help if panic or emergency occurs |
| Use in safe, calm environment | Reduces anxiety |
| Do not use if personal/family history of psychosis | Risk of triggering long-term psychosis |
| Do not redose | Tolerance builds immediately; redosing is wasteful and increases risk |
| Do not drive for 12-24 hours | Impaired perception, judgment |
| Have a “rescue” benzodiazepine if possible (educational only) | Trip killer (e.g., Xanax, Valium) can abort bad trips |
| Call for help if agitation, violence, or loss of consciousness | Do not assume it will “pass” |
Emergency Resources:
| Resource | Contact | Purpose |
|---|---|---|
| Fireside Project (psychedelic support) | 6-2FIRESIDE (623-473-7433) | Bad trip support, integration |
| Poison Control (US) | 1-800-222-1222 | Overdose guidance |
| 911 / Emergency | 911 | Life-threatening emergency |
| SAMHSA Helpline | 1-800-662-4357 | Substance use support |
Key Educational Message:
LSD (220ug) is a high to very high dose of a potent psychedelic. It produces intense perceptual, cognitive, and emotional effects lasting 6-12+ hours. Risks include bad trips, psychosis (in predisposed individuals), accidents, and long-term HPPD. NBOMe adulteration (bitter taste) is fatal at milligram doses — test before consuming. LSD is illegal in most countries (Schedule I/Class A). Clinical research is ongoing, but self-medication is dangerous and illegal.




