A report on Stimulant

Ritalin: 20 mg sustained-release (SR) tablets
A chart comparing the chemical structures of different amphetamine derivatives
Roasted coffee beans, a common source of caffeine.
Tablets containing MDMA
Lines of illicit cocaine, used as a recreational stimulant
Catha edulis

Overarching term that covers many drugs including those that increase activity of the central nervous system and the body, drugs that are pleasurable and invigorating, or drugs that have sympathomimetic effects.

- Stimulant
Ritalin: 20 mg sustained-release (SR) tablets

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Overall

A selection of MDMA pills, which are often nicknamed "Ecstasy" or "E".

Empathogen–entactogen

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Empathogens or entactogens are a class of psychoactive drugs that produce experiences of emotional communion, oneness, relatedness, emotional openness—that is, empathy or sympathy—as particularly observed and reported for experiences with 3,4-methylenedioxymethamphetamine (MDMA).

Empathogens or entactogens are a class of psychoactive drugs that produce experiences of emotional communion, oneness, relatedness, emotional openness—that is, empathy or sympathy—as particularly observed and reported for experiences with 3,4-methylenedioxymethamphetamine (MDMA).

A selection of MDMA pills, which are often nicknamed "Ecstasy" or "E".

This class of drug is distinguished from the classes of hallucinogen or psychedelic, and amphetamine or stimulants.

Two pairs of enantiomers: ephedrine (top) and pseudoephedrine (bottom)

Pseudoephedrine

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Sympathomimetic drug of the phenethylamine and amphetamine chemical classes.

Sympathomimetic drug of the phenethylamine and amphetamine chemical classes.

Two pairs of enantiomers: ephedrine (top) and pseudoephedrine (bottom)
A warning at an Australian pharmacy

It may be used as a nasal/sinus decongestant, as a stimulant, or as a wakefulness-promoting agent in higher doses.

Anorectic

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Drug which reduces appetite, resulting in lower food consumption, leading to weight loss.

Drug which reduces appetite, resulting in lower food consumption, leading to weight loss.

Drugs of this class are frequently stimulants of the phenethylamine family, related to amphetamine.

Adderall

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Adderall and Mydayis are trade names for a combination drug called mixed amphetamine salts containing four salts of amphetamine.

Adderall and Mydayis are trade names for a combination drug called mixed amphetamine salts containing four salts of amphetamine.

Both enantiomers are stimulants, but differ enough to give Adderall an effects profile distinct from those of racemic amphetamine or dextroamphetamine, which are marketed as Evekeo and Dexedrine/Zenzedi, respectively.

1 : 1 mixture (racemate)

Bupropion

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Atypical antidepressant primarily used to treat major depressive disorder and to support smoking cessation.

Atypical antidepressant primarily used to treat major depressive disorder and to support smoking cessation.

1 : 1 mixture (racemate)
Wellbutrin XL
Principal pathways of bupropion metabolism.
Comparison of steady-state plasma bupropion levels with bupropion IR 100 mg t.i.d. (3x/day), bupropion SR 150 mg b.i.d. (2x/day), and bupropion XL 300 mg q.d. (1x/day).

This is in contrast to stimulants, such as amphetamine and methylphenidate, which have an immediate onset of effect in the condition.

Uncoated aspirin tablets, consisting of about 90% acetylsalicylic acid, along with a minor amount of inert fillers and binders. Aspirin is a pharmaceutical drug often used to treat pain, fever, and inflammation.

Drug

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Any chemical substance that causes a change in an organism's physiology or psychology when consumed.

Any chemical substance that causes a change in an organism's physiology or psychology when consumed.

Uncoated aspirin tablets, consisting of about 90% acetylsalicylic acid, along with a minor amount of inert fillers and binders. Aspirin is a pharmaceutical drug often used to treat pain, fever, and inflammation.
Nexium (Esomeprazole) is a proton-pump inhibitor. It is used to reduce the production of stomach acid.
An Amazonian shaman
San Pedro, a psychoactive cactus.
Cannabis is a commonly used recreational drug.

These drugs are divided into different groups like: stimulants, depressants, antidepressants, anxiolytics, antipsychotics, and hallucinogens.

The first individual alkaloid, morphine, was isolated in 1804 from the opium poppy (Papaver somniferum).

Alkaloid

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Alkaloids are a class of basic, naturally occurring organic compounds that contain at least one nitrogen atom.

Alkaloids are a class of basic, naturally occurring organic compounds that contain at least one nitrogen atom.

The first individual alkaloid, morphine, was isolated in 1804 from the opium poppy (Papaver somniferum).
The article that introduced the concept of "alkaloid".
Friedrich Sertürner, the German chemist who first isolated morphine from opium.
Bufotenin, an alkaloid from some toads, contains an indole core, and is produced in living organisms from the amino acid tryptophan.
The nicotine molecule contains both pyridine (left) and pyrrolidine rings (right).
Head of a lamb born by a sheep that ate leaves of the corn lily plant. The cyclopia is induced by the cyclopamine present in the plant.
Strychnine tree. Its seeds are rich in strychnine and brucine.
Crystals of piperine extracted from black pepper.
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Voacamine
Villalstonine
Toxiferine
Dauricine
Tubocurarine
Carpaine
Thebaine
Naloxone

Other alkaloids possess psychotropic (e.g. psilocin) and stimulant activities (e.g. cocaine, caffeine, nicotine, theobromine), and have been used in entheogenic rituals or as recreational drugs.

Comedown (drugs)

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The comedown, or crashing (also "down", "low", or sometimes "crash"), is a phase of drug withdrawal that involves the deterioration in mood and energy that occurs when a psychoactive drug, typically a stimulant, clears from the blood in the bloodstream.

Escitalopram, a selective serotonin reuptake inhibitor (SSRI) used as an antidepressant.

Reuptake inhibitor

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Type of drug known as a reuptake modulator that inhibits the plasmalemmal transporter-mediated reuptake of a neurotransmitter from the synapse into the pre-synaptic neuron.

Type of drug known as a reuptake modulator that inhibits the plasmalemmal transporter-mediated reuptake of a neurotransmitter from the synapse into the pre-synaptic neuron.

Escitalopram, a selective serotonin reuptake inhibitor (SSRI) used as an antidepressant.
Tiagabine, a selective GABA reuptake inhibitor used as an anticonvulsant in the treatment of epilepsy and seizures.
Reserpine, a vesicular reuptake inhibitor that was used in the past to deplete serotonin, norepinephrine, and dopamine stores as an antipsychotic and antihypertensive. It was notorious for causing anxiety and depression, and as a result, was replaced by newer, more modern drugs instead.
Hyperforin, the primary active constituent responsible for the therapeutic benefits of extracts of the herb Hypericum perforatum (St. John's Wort), which is used as an antidepressant.

Various drugs exert their psychological and physiological effects through reuptake inhibition, including many antidepressants and psychostimulants.

Amfepramone

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Amfepramone, also known as diethylpropion, is a stimulant drug of the phenethylamine, amphetamine, and cathinone classes that is used as an appetite suppressant.