Methamphetamine absorption

Two further analytical methods are based on the formation of metal complexes. Reaction of dopamine with KzCrjOy gives a Cr complex which can be assayed by atomic absorption spectroscopy, carbon rod absorption spectroscopy or, if Kf CrjO has been used, by liquid scintillation spectroscopy. Since the complex still gives a reaction with fluorescamine, the side-chain is thought not to be involved in the formation of the complex. Methamphetamine hydrochloride can be precipitated as a Bi complex. Determination of the amount of Bi remaining in solution by atomic absorption spectroscopy provides an indirect method of assay for the amphetamine. ... 

Innovative research is also ongoing to characterize natural product-derived substances that prevent the gastrointestinal absorption of alcohol, and limit CNS receptor super-sensitivity responses to chronic methamphetamine abuse. Development of pharmacologic treatments that could effectively and safely achieve either goal would be of enormou spotential consequence in the management of two of the most intractable and costly substance abuse problems in the U.S, namely alcoholism and methamphetamine abuse. 

Stimulants In contrast to narcotics and depressants, this group of drugs stimulates functions of the CNS, induces alertness, and interferes with sleep. Common stimulants include cocaine, amphetamine, and methamphetamine. At high doses, many stimulants are hallucinogenic. The mechanisms of action within the class vary widely. Cocaine, for example, can block the absorption (called reuptake) of dopamine, serotonin, and norepinephrine, leading to generalized stimulation and potential hallucinogenic responses. ... 

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