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Douglas Harper's Etymology Dictionary
methamphetamine

1949, from methyl + amphetamine; so called because it was a methyl derivative of amphetamine.

Wiktionary
methamphetamine

n. A highly addictive phenethylamine stimulant drug, similar to cocaine. Its systematic (IUPAC) name is (S)-N-methyl-1-phenylpropan-2-amine.

WordNet
methamphetamine

n. amphetamine used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant [syn: methamphetamine hydrochloride, Methedrine, meth, deoxyephedrine, chalk, chicken feed, crank, glass, ice, shabu, trash]

Wikipedia
Methamphetamine

Methamphetamine (contracted from ) is a strong central nervous system (CNS) stimulant that is mainly used as a recreational drug and less commonly as a treatment for attention deficit hyperactivity disorder and obesity. Methamphetamine was discovered in 1893 and exists as two enantiomers: levo-methamphetamine and dextro-methamphetamine. Methamphetamine properly refers to a specific chemical, the racemic free base, which is an equal mixture of levomethamphetamine and dextromethamphetamine in their pure amine forms. It is rarely prescribed due to concerns involving human neurotoxicity and potential for recreational use as an aphrodisiac and euphoriant, among other concerns, as well as the availability of safer substitute drugs with comparable treatment efficacy. Dextromethamphetamine is a much stronger CNS stimulant than levomethamphetamine.

Both methamphetamine and dextromethamphetamine are illicitly trafficked and sold owing to their potential for recreational use. The highest prevalence of illegal methamphetamine use occurs in parts of Asia, Oceania, and in the United States, where racemic methamphetamine, levomethamphetamine, and dextromethamphetamine are classified as schedule II controlled substances. Levomethamphetamine is available as an over-the-counter (OTC) drug for use as an inhaled nasal decongestant in the United States. Internationally, the production, distribution, sale, and possession of methamphetamine is restricted or banned in many countries, due to its placement in schedule II of the United Nations Convention on Psychotropic Substances treaty. While dextromethamphetamine is a more potent drug, racemic methamphetamine is sometimes illicitly produced due to the relative ease of synthesis and limited availability of chemical precursors.

In low doses, methamphetamine can elevate mood, increase alertness, concentration and energy in fatigued individuals, reduce appetite and promote (initial) weight loss. At higher doses, it can induce psychosis, breakdown of skeletal muscle, seizures and bleeding in the brain. Chronic high-dose use can precipitate unpredictable and rapid mood swings, prominent delusions and violent behavior. Recreationally, methamphetamine's ability to increase energy has been reported to lift mood and increase sexual desire to such an extent that users are able to engage in sexual activity continuously for several days. Methamphetamine is known to have a high addiction liability (i.e. compulsive methamphetamine use) and dependence liability (i.e. withdrawal symptoms occur when methamphetamine use ceases). Heavy recreational use of methamphetamine may lead to a post-acute-withdrawal syndrome, which can persist for months beyond the typical withdrawal period. Unlike amphetamine, methamphetamine is neurotoxic to humans, damaging both dopamine and serotonin neurons in the CNS. This damage includes adverse changes in brain structure and function, such as reductions in grey matter volume in several brain regions and adverse changes in markers of metabolic integrity.

Methamphetamine belongs to the substituted phenethylamine and substituted amphetamine chemical classes. It is related to the other dimethylphenethylamines as a positional isomer of these compounds, which share the common chemical formula: .

Usage examples of "methamphetamine".

He had hoped she would assume he had succumbed again to methamphetamine hydrochloride and was sparing her the agony of his descent back into the hell of chemical dependence.

In several areas, the methamphetamine hydrogenators were located in the basements of apartment complexes and in the middle of crowded urban areas.

The basic components of methamphetamine are phenyl acetone, a controlled substance that can be made in a simple four-step process with chemicals bought from supply companies, and N-methyl formamide.

WAS, not so long ago, when a dystopic Future was a scarily enticing precinct, to be entered warily and carefully armed, or at least fashionably dressed: think of the methamphetamine dreamscapes of writers like William Gibson, Samuel R.

His source of locomotion was nine tentacles in a trilobate pattern that whipped back and forth like rattlers on methamphetamine.

Amphetamines are broken down chemically into three types: salts of racemic amphetamines, dextroamphetamines, and methamphetamines, which only differ in potencies.

The Outlaws also control methamphetamine laboratories in Georgia and, along with other outlaw motorcycle gangs, plan to supply the US eastern seaboard and midwest with marijuana from Hawaii.

Unzipping my knapsack, I handed him our latest Voice of the Butterfly tape: Lydia Babcock high on methamphetamines and Noni juice, doing the nasties to FAGERBAN.

Some over-the-counter cough syrups contained the chemical compound pseudoephedrine, needed to make methamphetamine.

Starkey knew that the vast majority of bombings were the result of drug wars between rival methamphetamine dealers, many of whom were white bikers.

I was higher than a kite on PCP, methamphetamines, whatever it was-some amazing mix of excitation and immortality.

This lady may have been a drug abuser, so I'll want a drug screen for opiates, amphetamines and methamphetamine, barbiturates, cannabinoids, as fast as you can get it.

Methamphetamine, born of so many dangerous and toxic chemicals that it is impossible to believe it could ever be safely handled, is one of the nation's fastest-growing abused drugs.

Upon further investigation, firefighters discovered remnants of precursor chemicals used in the manufacture of methamphetamines .

He had two more of the special Contacs, a half-dozen methamphetamines.