Hi since you have nt described your reason of visiting the dentist at tijuana , i presume you had a painful dental infection since he has prescribed you a painkiller and antibiotic combination . if you would have walked-in my clinic , i usually prefer giving amox + metronidazole as a safe a effective combination with a ketorol-dt or seredec-p for pain as well as imflamation . they have worked brillaintly well with rest of my patients without giving them any adverse trauma .we do usually prescibe a pantop (antacid) along with the above for the acidity caused due to the medications. hope this was helpful .take care .