Guinea pig maximization test: no skin sensitization
“At 24 and 48 hours after the challenge patch removal, the guinea pigs induced and challenged with AAI101 did not exhibit any skin responses and received the same Magnusson and Kligman grades (0% positive reaction) as the vehicle control group.”
No melanin binding; no preferential retention in skin, eye or uveal tract
“There was no preferential distribution to or retention in the skin, the eye or the uveal tract, i.e., no specific binding of [14C]-enmetazobactam and drug related radioactivity to melanin was indicated.”
Hepatotoxicity (liver primary target of enmetazobactam)
“Based on the 28-day Repeated Dose Toxicity (RDT) studies of enmetazobactam and the 28-day and 13-week combination studies in rats and dogs, the liver appears to be a primary target of toxicity for enmetazobactam.”