.Did a doctor tell you you were allergic or did you have side effects.
Because whenever a patient tells me they have a penicillin allergy I have to ask what happens. Most of the time it's like "I got diarrhea" or "my stomach gets upset". Those are usually side effects, not allergies, and the docs are probably going to give it to you anyways.
I've never actually been treated with penicillin but everyone I'm related to has an official documented issue with it so I've been advised not to bother.
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"Setsuna, you have to change. To make up for me... who didn't change." ~SCP~
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