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Brivaracetam has been tested in a comprehensive safety pharmacology, toxicology, developmental toxicology, and genotoxicity program. It is of low acute toxicity, target organ for toxic effects is the hepatobiliary tract. Carcinogenicity studies are ongoing. Human pharmacology studies have shown that brivaracetam has a half-life of 8 h and nearly complete bioavailability . CSD episodes were regularly elicited on slices upon delivery of calibrated KCl drops and were recorded via two micropipette electrodes. After control CSDs, the drug was added to the perfusion and five subsequent CSDs were elicited during drug perfusion. Effects were assessed via CSD amplitude (Ampl) and duration at half-amplitude (D(1/2)). BRV, 10 and 32 microM reduced the Ampl and transiently the D(1/2). Levetiracetam, 32 and 100 microM had no effect on either Ampl or D(1/2) . Brivaracetam bound selectively with 20 fold higher affinity than levetiracetam to SV2A . BRV produced a concentration-dependent inhibition of西安瑞禧生物提供各种抑制剂材料。