Carisoprodol is a skeletal muscle relaxant whose active metabolite is meprobamate. Although several case reports have shown that carisoprodol has abuse potential[citation needed], it continues to be widely prescribed (except in the United Kingdom where use of benzodiazepines is preferred). Carisoprodol is a colorless, crystalline powder, having a mild, characteristic odor and a bitter taste. It is slightly soluble in water and freely soluble in alcohol, chloroform and acetone. Its solubility is practically independent of pH. It is marketed in the United States under the brand name Soma, and in the United Kingdom and other countries under the brand name Carisoma.
Effects:
Analgesia
Relief from hypertonia
Pharmacokinetics
Carisoprodol has a rapid, 30 minute onset of action, with the aforementioned effects lasting for approximately 2–6 hours. It is metabolized in the liver via the cytochrome P450 oxidase isozyme CYP2C19, excreted by the kidneys and has an approximate 8 hour half-life. A considerable proportion of carisoprodol is metabolized to meprobamate, which is a known drug of abuse and dependence; this could account for the abuse potential of carisoprodol.
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