[Erowid Note: The use of halothane for anaesthesia in hospital settings has largely been replaced with other inhalant anesthetics.] My group recently aquired a small flask of halothane, one of the preferred agents for inhalation-anaesthesia in hospitals.
Halothane
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- no dose data
- PubChem toxicity data
- classified Tentative
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- no dose data
- PubChem toxicity data
- classified Tentative
Summary
A powerful inhalant anaesthetic generally used in a medical setting to induce unconsciousness, as a supplement with ketamine or fentanyl.
Tolerance
Build-up
develops over 1–4 weeks of regular use
Reset
Falls after you stop, at a rate that varies from person to person. If you've been using regularly, cut down gradually with medical help rather than stopping suddenly.
No tolerance chart. Our decay curves for these drugs were estimates, and a curve can make tolerance look longer-lasting than it is, which is the dangerous direction.
How fast tolerance to these drugs fades after a break has not been measured well enough to draw, so don't count on a dose you used to take still being safe: after time off, start with a much smaller amount and don't use alone. Mixing sedatives with each other, with alcohol or with opioids sharply raises the risk of a fatal overdose. If you've been using regularly, don't stop suddenly: withdrawal from benzodiazepines, alcohol or GHB/GBL can cause seizures or delirium, so get medical help to cut down gradually.
Sources: FRANK: benzodiazepines · Alcohol and Drug Foundation: GHB · FDA 2020: benzodiazepine boxed warning · FDA 2019: gabapentinoids and breathing · NHS: alcohol use disorder
Effects
Effect glossary — · full glossary
Positive
Negative
Positive
Negative
Positive
Negative
Community Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, Bluelight, and Dose.wiki. Click a source to expand. Reports are harm-reduction context, not medical guidance. Tags summarise each author's own verdict — how reports are classified.
Erowid 1 report 1 cautionary visit
Halothane's nerd page
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