Ate catfish felt weird, out of breath, felt like i would faint. used epipen, (epinephrine) ems gave me oxygen. allergyblood test said no allergy how can this be?

Mgt/workup: If your reaction was within four hours of eating the fish, it is likely to be an allergic reaction. I hope that you have an Epi Pen with instructions for use. There is more information at foodallergy.org, until you have a repeat test. Lab tests are not perfect, but your symptoms certainly fit with an allergic reaction. A virtual appt is available for follow up.

Possibilities: Hyperimmune response to catfish would involve both the presence of allergy antibody (IgE antibody against fish) and the tendency for this antibody-catfish interaction to cause the reaction. It is possible that IgE was not appropriately tested for in the blood. A skin test would also confirm allergy if positive. Non-fish allergy causes (eg asthma attack or vocal cord spasm) also possible.

See allergist: Blood test is generally less sensitive than skin tests,thus I would urge you to consult an allergist. Rarely one may t be allergic to only one species of fish and thus testing with the actual catfish may be considered. If the fish was fried, it was likely contaminated with other foods particularly shellfish or crustacea. You need an allergist's help to sort this out. Carry epinephrine always.

Dr Hegab and another doctor agreed