<prompt> All the following statements are true regarding beta-lactams exceptImipenem should be given with cilastatinMeropenem should be given with cilastatinAztreonam doesnt show cross resistance with cephalexinMethicillin is given by parenteral route  <response>: Among carbapenems, Imipenem should always be given with cilastatin to prevent renal failure and convulsions. No need to give mero and doripenem with cilastatin.Cross-resistance is not seen with aztreonam among beta-lactams.Methicillin is inactivated by gastric acid so administered parenterally.Ref: Katzung 3rd ed; pg 781 