Complete dosage information for 1P-LSD — threshold, light, common, strong, and heavy dose ranges across 1 route of administration.
Full 1P-LSD profileImportant Safety Notice
Dosage information is for harm reduction purposes only. Individual sensitivity varies greatly. Always start with the lowest effective dose and work your way up slowly. Never eyeball doses — use a milligram scale.
## Can You Overdose on 1P-LSD? A fatal pharmacological overdose on 1P-LSD is extraordinarily unlikely. Because it converts to LSD, the lethal dose would be equivalent to LSD's estimated lethal threshold -- roughly 14,000 µg or more, which is 100-140 times a standard dose. No death from the pharmacological action of LSD or any confirmed LSD prodrug has ever been documented. However, "overdose" in practical terms means taking more than you can psychologically manage. With 1P-LSD specifically, the extended come-up window (45-90 minutes) is the most common pathway to accidental high-dose experiences: users redose during the quiet period and end up at double their intended amount. ## Recognizing a Crisis Most situations involve psychological distress, not medical emergency. Seek immediate medical attention if someone exhibits: - **Hyperthermia** -- Dangerously elevated body temperature is the most serious physical risk at extreme doses - **Seizures** -- Rare with genuine lysergamides but possible with adulterants (NBOMe compounds especially) - **Signs of serotonin syndrome** (if combined with serotonergic drugs): muscle rigidity, rapid temperature rise, confusion, clonus - **Complete unresponsiveness** or catatonia - **Self-harm behavior** or expressed suicidal intent ## Psychological Distress Response For someone having a difficult experience but not in medical danger: - Change the environment immediately -- different room, go outside, change or stop the music - Provide calm, grounding reassurance: "You are safe. You took a substance. This is temporary and it will end" - Maintain physical presence. Do not leave a distressed person alone - Cold water on face and wrists for grounding - **Benzodiazepines** (diazepam 10-20 mg) reliably reduce intensity without dangerous interaction. Many experienced users keep these available as standard preparation ## Medical Emergency Response Call emergency services without hesitation for any physical safety concern. Good Samaritan laws in most jurisdictions protect people who call for help during drug emergencies. Inform responders that a lysergamide psychedelic was taken. There is no specific antidote; treatment is supportive (IV fluids, cooling for hyperthermia, benzodiazepines for agitation and seizures). ## After a Difficult Experience Talk through what happened with a trusted person within the first few days. Avoid additional psychedelic use for an extended period. Monitor for persistent symptoms -- anxiety, depersonalization, visual disturbances -- and seek professional help if they continue beyond two to three weeks.
A common oral dose of 1P-LSD is 75–150 µg.
The threshold dose for 1P-LSD via oral is approximately 15 µg.
1P-LSD typically lasts 8–12 hours via oral.