Abstract
Paclitaxel Inj. [NK] (test; paclitaxel, CAS 33069-62-4) is a generic version of the
drug from the originator (reference). Both drugs contain the same active ingredient
and showed identical pharmacokinetics in patients in the previous study; however,
these two drugs may have different safety profiles because they contain different
inactive ingredients. Thus, in this study, peripheral neurotoxicity, one of the dose-limiting
toxicities of the reference, was compared between the test and the reference in rats
electrophy-siologically and histopathologically. In a nerve conduction study, the
amplitude of the caudal sensory nerve action potentialdecreased significantly after
either the test or the reference administration, compared with the amplitude after
saline administration, but no significant differences were observed between the two
drugs. Histopathologically, apparent degeneration of the myelinated fibers in the
sciatic and the sural nerves was seen after either the test or the reference injection,
compared with after saline injection, but no apparent differences were observed between
the two formulations. These results suggest that no significant difference in peripheral
neurotoxicity exists between the test and the reference in rats.
Key words
Antitumor agent - CAS 33069-62-4 - Histopathological study - Nerve conduction study
- Paclitaxel, injection, rat - Sensory neuropathy