Does antihistamines affect fillers? I just had fillers done but I have an allergy going on (hives and eczema).

Antihistamine use will not affect filler injections, however if you have an eczema flare up anywhere near the filler injection site I would hold off on filler inject until the eczema flare up has subsided. 

Dear nightingale,
Thank you for your query.
Rest assured.
Antihistamines are absolutely safe with dermal fillers. And are useful for those with sensitivity conditions.
I hope this helps.
Dr Daniel Chang