Клонидин

Использование

Clonidine may be useful in the treatment of acute opioid withdrawal. Epidural clonidine 1–2μgkg –1 increases the duration and potency of analgesia provided by epidural opioid or local anaesthetic drugs.

Определение

ChEBI: A clonidine that is 4,5-dihydro-1H-imidazol-2-amine in which one of the amino hydrogens is replaced by a 2,6-dichlorophenyl group.

Фармакокине?тика

Clonidine is lipid soluble and rapidly absorbed after oral administration, with a peak plasma concentration occurring in 60–90min. O ral, intravenous and intramuscular routes may be used for sedation or analgesia. I n addition, epidural and intrathecal clonidine is used to augment regional anaesthesia, but perineural administration is of limited or no effect. The elimination halflife is 9–13h and is prolonged in renal failure. Fifty percent of an administered dose is excreted unchanged by the kidneys, and 50% is metabolised in the liver to inactive metabolites.

Метаболический путь

Clonidine is well absorbed orally, with peak plasma concentrations after 60–90min. I t is highly lipid soluble, and approximately 50% is metabolised in the liver to inactive metabolites; the rest is excreted unchanged via the kidneys, with an elimination half-life of 9–12h.