A member asked:

My doc says cos i'm allergic to ondansetron that i'm also allergic to antihistamines, what can i use for gritty itchy eyes due to spring allergies?

4 doctors weighed in across 2 answers

Huh?: Ondansetron allergy is very uncommon. I am no allergist, but there is no apparent overlap between the antihistamine H1 and H2 receptor and the antiemetic HT3 receptor that I am aware of. In addition, antihistamines have been used as part of the treatment of ondansteron allergy. I suggest you clear this up with your doc.

Answered 3/9/2015

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Dr. John Chiu answered

Highly unlikely: I think it is time for you to consult an allergist to help you sort out this issue. That you are allergic to all antihistamines and ordansetron is a highly unlikely event. You will also need to distinguish between side effects vs allergies.

Answered 3/9/2015

3.8k views

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