The best replacement for imipenem is meropenem.

The best alternatives to imipenem are rated as following:
★★★★★  meropenem
★★  doripenem
★★  ertapenem
★  zosyn
★  cefepime
  piperacillin tazobactam

Your alternative for imipenem is not listed? Suggest!
Speaking about imipenem, one probably shouldn't forget about cilastatin.

Other search terms related to imipenem and their ratings are:

★★★★★ cilastatin
★★ penicillin allergy
You have in mind a companion for imipenem and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of imipenem in all years. Click on graph for more.