hello Some antibiotics do give a metallic taste or taste disturbances you have not mentioned the name of your antibiotics so its difficult to say. The taste change usually goes in a weeks time of stoppage of antibiotics . But still you have it could be because of some gastro -esophageal reflux You can take--- Tab. Omeprazole +Domperidom two times a day half an hour before meals Syp. Antacid gel 2 tsf two times a day half an hour before meals Betadine gargle 2 tsf in half glass of water two times a day this will help.