Prodrug positive in vitro (mammalian gene mutation, CHO chromosomal aberration); negative in mouse bone marrow micronucleus
“The prodrug, tebipenem pivoxil was found to be mutagenic in a mammalian cell gene mutation assay and induced chromosomal aberrations in Chinese hamster ovary (CHO) cells in vitro; however, it was not clastogenic in an in vivo bone marrow micronucleus study in mice.”
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reproductive & developmental
Mouse, rat and monkey EFD: no adverse developmental effects
“As noted in that review, no adverse developmental effects were noted in embryofetal development (EFD) studies following oral administration of tebipenem pivoxil to pregnant mice, rats and monkeys during periods of organogenesis.”
No clinically relevant findings in hERG, CNS, cardiovascular or respiratory studies
“There were no clinically relevant safety concerns observed with tebipenem pivoxil or tebipenem in any nonclinical in vitro and in vivo safety pharmacology studies (e.g., human ether a-go-go-related gene [hERG], CNS, cardiovascular, and respiratory).”
Not genotoxic overall: Ames negative; in vitro chromosome aberration positive without (not with) metabolic activation; rat micronucleus and comet negative