if you are allergic to amoxicillin you should avoid all drugs in the penicillin class. this would include oxacillin. it is entirely possible to have taken a penicillin in childhood without any adverse reaction and then develop an allergy later in life. that's because allergies develop upon repeated exposure to an allergen. in other words almost no one is allergic to penicillin the first time they're exposed. most people exhibit an allergic reaction on some subsequent exposure. you should be sure to note your penicillin allergy on your medical record. a severe allergic reaction to penicillin can result in death. for most needs there are other antibiotics that can be used in place of a penicillin. wishing you well!
does an amoxicillin allergy mean i can't take oxacillin? . can i take oxacillin with an amoxicillin allergy even though i took penicillin throughout my childhood without any problems?