My 64 Yr Old Husband Is Being Treated With Ertapenem

My 64 yr old husband is being treated with Ertapenem (Invanz) for his 6th UTI in 9 months, now determined to be caused by an underlying prostate infection. And they further determined the eColi causing the current infection is of an antibiotic resistent strain that's in-sensitive to all oral antibiotics. How bad is the drug on the kidney and liver, as well as other organs? Are there means to determine serious problem during treatment? Thanks!!