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Chemical name 2-methoxy-4-methyl-5-methylsulfinylamphetamine or
CAS number 84910-95-2
Chemical formula C12H19NO2S
Molecular mass ?

TOMSO, or 2-methoxy-4-methyl-5-methylsulfinylamphetamine, is a lesser-known psychedelic drug and a substituted Amphetamine. TOMSO was first synthesized by Alexander Shulgin. In his book PIHKAL (Phenethylamines I Have Known and Loved), the dosage range is listed as 100-150 mg, and the duration listed as 10-16 hours. TOMSO is inactive on its own; it is actived with the consumption of alcohol. It produces intense time distortion and a threshold. Shulgin gives it a +++ on the Shulgin Rating Scale [1]. Very little data exists about the pharmacological properties, metabolism, and toxicity of TOMSO.

To "Tomso"

The form of activation of triggering by consumption of alcohol -- like that which occurs with TOMSO -- occurs in several other drugs. Shulgin uses the verb "to Tomso" in his description of drugs that are activated this way. An example of a drug that is activated with the consumption of alcohol is Metaescaline.


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