Age-associated cognitive impairment, supplemental therapy in cortical myoclonus.
藥理
Piracetam acts on the CNS and has been described as a `nootropic'; it is said to protect the cerebral cortex against hypoxia. It is also reported to inhibit platelet aggregation and reduce blood viscosity at high doses.
藥動學
high distribution in cerebrospinal fluid; not metabolized in the body; primarily excreted unchanged in the urine; Elimination Half-life: 5 to 6 hrs in normal renal function. Piracetam removed by H/D: 50-60%.
禁忌症
Previous hypersensitivity to piracetam, Huntington's chorea, cerebral hemorrhage, End stage renal disease.
懷孕分類
Animal studies do not indicate direct or indirect harmful effects.
哺乳分類
Piracetam crosses the placental barrier and is excreted in human breast milk.
副作用
insomnia, somnolence, weight gain, hyperkinesia, nervousness, and depression.
劑量和給藥方法
Orally, age-associated cognitive impairment: 1.2~2.4 g daily. Cortical myoclonus: 7.2 g daily in 2 or 3 divided doses, increasing by 4.8 g daily every 3 or 4 days up to a maximum of 24 g daily.