Penicillin allergy tattoo symbol

[Ki3r]

Not sure if this is the best place for it, as its not really a health matter as such.

I'm allergic to penicillin, and normally have a bracelet that says I am, however, I'm always forgetting to put it back on after a shower.

I was thinking of getting a tattoo to say this, is there a symbol that shows this?

Having a quick Google search it appears that there isn't, but thought I would ask anyway.

Does anyone know of anything?