Stimulants
CNS Stimulants: Cocaine, Amphetamines and Cannabinoids
Insufficient Sleep and Sleep Deprivation
Substance Use Disorders Affecting Sleep
CNS Depressants: Alcohol and Nicotine
CNS Depressants: Barbiturates and Benzodiazepines
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Updated: Jul 3, 2026

Caffeine Extraction, Enzymatic Activity and Gene Expression of Caffeine Synthase from Plant Cell Suspensions
Published on: October 2, 2018
1Department of Neurology, Given C219B, University of Vermont College of Medicine, 89 Beaumont Avenue, Burlington, VT 05405, USA. robert.shapiro@uvm.edu
Caffeine, a common psychostimulant, can help with headaches but chronic use risks dependency and withdrawal headaches. Its effects on headache disorders highlight adenosine
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