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AMT Dosage
by Erowid


Alpha-methyl Tryptamine is a long lasting tryptamine most similar in nature perhaps to LSD. For some people, the effects come on quickly, and for others quite slowly. Many people experience nausea and vomiting with AMT. There is some reason to believe it may work as a mild MAOI.
Oral AMT Dosages
Threshold5 - 15 mg
Light10 - 25 mg
Common20 - 40 mg
Strong30 - 60 mg
Heavy60 - 80 mg

Onset : 60 - 180 minutes
Peak : 3 - 5 hours
Duration : 10 - 14 hours (higher doses seem to last longer)
Normal After Effects : 1 - 5 hours

Warning! Because AMT's effects can take over 2 hours to fully develop, a common error is to redose (add more) thinking that the initial dose was too low. This has lead to a number of very unpleasant and potentially dangerous overdose experiences. Those who have made this error recommend waiting until at least 2.5 hours after the initial dose to add more.
Notes #
  1. We have received several complaints that the oral dosages shown are too low. There are a number of reports of individuals taking 100-200 mg recreationally and some of these people argue that the reports of overwhelming effects felt by others at 40-80 mg are exaggerated. It is important to keep in mind how much variation there is in experiential effects based on personal biochemistry, expectation, and other difficult to determine factors. We have received reliable reports of overwhelming effects with as little as 40 mg and users taking as much as 400 mg (!).
  2. We have also received several reports of severe vomiting, dissociation, dehydration, and extreme reactions with as little as 40 mg oral AMT. It is safer for new users (or with new batches) to begin experimentation at the threshold or light level of any psychoactive drug to avoid dangerously strong reactions.
  3. People experienced in experimenting with powerful psychoactives recommend starting with very low doses and working up to check for one's personal thresholds for each compound.




Smoked/Vaporized AMT Dosages
Threshold2 mg
Light4 - 5 mg
Common6 - 10 mg
Strong10 - 20 mg

Onset : 10 seconds - 30 minutes
Duration : 8 - 12 hours





Every individual reacts differently to every chemical.
Know your Body - Know your Mind - Know your Substance - Know your Source.

Erowid's dosage information is a summary of data gathered from users, research, and other
resources and should not be construed as recommendations. Individuals can respond
differently to the same dosage. What is safe for one can be deadly for another.