examples of drugs not found to have a significant effect on theophylline pharmacokinetics are ranitidine , josamycin , midecamycin , amoxycillin , tetracycline , cephalexin , cefaclor , orciprenaline , metoprolol , antacids , medroxyprogesterone acetate , metoclopramide and metronidazole .
C0007716
cephalexin
C0007537
cefaclor