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• (+)-CPCA
• (-)-2ß-(1,2,4-Oxadiazol-5-methyl)-3ß-phenyltropane
• (-)-2ß-(3-(4-Methylphenyl)isoxazol-5-yl)-3ß-(4-chlorophenyl)tropane
• (-)-2ß-(3-methylisoxazol-5-yl)-3ß-(4-methylphenyl)tropane
• (S2) Keep out of the reach of children
• 1-(3,4-Dichlorophenyl)-1-(piperidin-2-yl)butane
• 1-(Thiophen-2-yl)-2-aminopropane
• 1-Benzyl-4-(2-(diphenylmethoxy)ethyl)piperidine
• 1-Methylamino-1-(3,4-methylenedioxyphenyl)propane
• 1-Phenyl-2-(piperidin-1-yl)pentan-3-one
• 2'-MeCCPA
• 2,3-Methylenedioxyamphetamine
• 2-(1-Hexynyl)-N-methyladenosine
• 2-Amino-1,2-dihydronaphthalene
• 2-Aminoindane
• 2-Aminotetralin
• 2-Benzylpiperidine
• 2-Cl-IB-MECA
• 2-Diphenylmethylpyrrolidine
• 2-Fluoroamphetamine
• 2-Fluoromethamphetamine
• 2-Hydroxyphenethylamine
• 2-MDP
• 2-Methyl-3-phenylpiperidine
• 2-Phenyl-3,6-dimethylmorpholine
• 2-Phenyl-3-aminobutane
• 2-Phenyl-3-methylaminobutane
• 2-Phenylcyclohexylamine
• 2-Propanoyl-3-(4-isopropylphenyl)-tropane
• 2a-(Propanoyl)-3ß-(2-(6-methoxynaphthyl))-tropane
• 2C-B-BZP
• 2ß-Propanoyl-3ß-(2-isopropenyl)-tropane
• 2ß-Propanoyl-3ß-(2-naphthyl)-tropane
• 2ß-Propanoyl-3ß-(4-tolyl)-tropane
• 3',4'-Methylenedioxy-a-pyrrolidinobutiophenone
• 3',4'-Methylenedioxy-a-pyrrolidinopropiophenone
• 3'-Chloro-3a-(diphenylmethoxy)tropane
• 3,3-Diphenylcyclobutanamine
• 3,4-Dichloromethylphenidate
• 3,4-Dimethylmethcathinone
• 3,4-Methylenedioxyamphetamine
• 3-(p-Fluorobenzoyloxy)tropane
• 3-Benzhydrylmorpholine
• 3-CPMT
• 3-Fluoroamphetamine
• 3-Fluoroethamphetamine
• 3-Fluoromethcathinone
• 3-Methoxy-4-methylamphetamine
• 3-Methoxyamphetamine
• 3-Methoxymethamphetamine
• 3-Methylamphetamine
• 4'-Fluorococaine
• 4'-Methoxy-a-pyrrolidinopropiophenone
• 4'-Methyl-a-pyrrolidinobutiophenone
• 4'-Methyl-a-pyrrolidinohexiophenone
• 4'-Methyl-a-pyrrolidinopropiophenone
• 4-Benzylpiperidine
• 4-Bromomethcathinone
• 4-Ethylamphetamine
• 4-Fluoroamphetamine
• 4-Fluoromethamphetamine
• 4-Hydroxy-3-methoxymethamphetamine
• 4-Methylaminorex
• 4-Methylamphetamine
• 4-Methylmethamphetamine
• 4-Methylmethylphenidate
• 4-Methylphenylisobutylamine
• 4-Methylthioamphetamine
• 5'-N-ethylcarboxamidoadenosine
• 5-(2-Aminopropyl)indole
• 5-IAI
• 6-Br-APB
• 6-Fluoronorepinephrine
• 8-Chlorotheophylline
• 8-Cyclopentyl-1,3-dimethylxanthine
• 8-Cyclopentyl-1,3-dipropylxanthine
• 8-Phenyl-1,3-dipropylxanthine
• 8-Phenyltheophylline
• A-349,821
• A-366,833
• A-77636
• A-84,543
• ABT-202
• ABT-239
• ABT-418
• Acefylline
• Acetylcarnitine
• Acetylcholine
• Acetylcholinesterase
• Achiote
• Acid dissociation constant
• Activated carbon
• Adafenoxate
• Adamantane
• Adaphenoxate
• Adapromine
• Addiction
• Aden
• Adenosine
• Adenosine monophosphate
• Adenosine receptor
• Adenosine triphosphate
• ADHD
• Adrafinil
• Adsorption
• AeroPress
• Affogato
• Agonist
• AHN-1055
• AL-1095
• Al-Razi
• Alchemy
• Alfetamine
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• Alpha-7 nicotinic receptor
• Alpha-adrenergic agonist
• Alpha-Ethylphenethylamine
• Alpha-Pyrrolidinobutiophenone
• Alpha-Pyrrolidinopentiophenone

Caffeine

Caffeine is a bitter, white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants. It is most commonly consumed by humans in infusions extracted from the seed of the coffee plant and the leaves of the tea bush, as well as from various foods and drinks containing products derived from the kola nut. Other sources include yerba maté, guarana berries, guayusa, and the yaupon holly.

In humans, caffeine acts as a central nervous system stimulant, temporarily warding off drowsiness and restoring alertness. It is the world's most widely consumed psychoactive drug, but, unlike many other psychoactive substances, it is both legal and unregulated in nearly all parts of the world. Beverages containing caffeine, such as coffee, tea, soft drinks, and energy drinks, enjoy great popularity; in North America, 90% of adults consume caffeine daily.