LessWrong (Curated & Popular) "Near-Instantly Aborting the Worst Pain Imaginable with Psychedelics" by eleweek
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Feb 8, 2026 They explore the extreme agony of cluster headaches and why common pain scales fail to capture it. The discussion covers rapid relief from inhaled DMT and the slower effects of LSD and psilocybin. Biological theories about serotonin, hypothalamic timing, and trigeminal wiring are examined. They also introduce ClusterFree, a campaign to expand access, research, and legal change.
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Cluster Headaches Are Terrifyingly Severe
- Cluster headaches are brief but excruciating attacks often around the eye and temple that recur in 8–10 week cycles each year.
- About 1 in 2,000 people suffer from them and patients describe suicidal levels of pain and helplessness.
Patients Describe Hellish First-Person Suffering
- Eve and Thomas give vivid first-person accounts of being 'plunged into the pain' and feeling like someone is 'stabbing a knife in your eye and turning it for hours.'
- These testimonies explain why cluster headaches earned the nickname 'suicide headaches.'
Pain Ratings Compress Extreme Suffering
- Standard pain scales compress extreme suffering because subjective reporting follows a logarithmic-like compression (Weber's law).
- This makes very high pain experiences have long tails and appear only modestly worse on 0–10 or QALY-based metrics.
