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Sulbutiamine
Sulbutiamine is a synthetic derivative of thiamine (vitamin B1) used as a nootropic and stimulant. It emerged from 1950s Japanese efforts to develop thiamine derivatives with better bioavailability than thiamine itself, alongside compounds such as fursultiamine and benfotiamine. It is prescribed for asthenia and thiamine deficiency, and is also sold as a dietary supplement. Consistent use may reduce dopamine output over time.
Dosage & Duration
Dosage
Doses are population estimates that vary widely between individuals.
While daily use can result in tolerance and paradoxical drowsiness, increasing the dose is strongly discouraged and side effects can include diarrhea, bladder infections, bronchitis, back pain, abdominal pain, insomnia, constipation, gastroenteritis, headache, vertigo, and sore throat.
Duration
Subjective Effects
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Sulbutiamine is used as a nootropic and mild stimulant, with users reporting improved mood, motivation, and mental performance. Effects are subtle rather than perceptual, and daily use can lead to tolerance and a paradoxical drowsiness rather than continued stimulation.
Physical
The physical profile is stimulant-like and oriented toward reducing weakness and fatigue. Adverse physical effects reported in clinical use include headache, gastrointestinal discomfort, insomnia, and vertigo.
Uncomfortable
Cognitive
Reported cognitive effects centre on enhanced memory and focus, alongside an improved mood and increased motivation. Poor concentration and fatigue-related mental sluggishness are the states it is most often taken to address.
Enhancements
Pharmacology
Pharmacodynamics
Sulbutiamine is a thiamine derivative described as a potent cholinergic. Its pharmacology has been examined in mice and rats, where it may raise thiamine phosphate levels in the brain more effectively than benfotiamine and fursultiamine, although this has not been fully verified. It has also been reported to reduce dopamine output over time with consistent use, and studies in retinal ganglion cells indicate it helps prevent apoptotic cell death caused by trophic factor deprivation.
Pharmacokinetics
Sulbutiamine belongs to a group of thiamine disulfides developed to improve on the bioavailability of thiamine itself. These compounds are hydrophobic, allowing them to pass readily from the intestines into the bloodstream, where they are reduced to thiamine by cysteine or glutathione.
Interactions
An unlisted combination is an unknown one, not a safe one. Check a dedicated combination chart before mixing.
Tolerance
Harm Potential
History & Culture
Sulbutiamine emerged from research in the 1950s, conducted mainly in Japan, aimed at developing thiamine derivatives with better bioavailability than thiamine itself. That work led to the identification of allicin (diallyl thiosulfinate) in garlic, which served as a model for medicinal chemistry…
Legality
Article Status
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Recent changes7 human edits · latest
Times are UTCNewest first
24 January 2026
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
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