My allergy doctor told me 3 weeks.

If ypu have an Anahylactic reaction, whether it be mild or severe (as far as stomach cramps or breathing difficulty, swelling etc..) my hospital told me that it can re-occur at any time within the next 3 days. For no apparent reason 😕 That is why (in Australia), they give you antihistamines and steroids for 3 days after Anaphylaxis.

During planting season and during harvest season i either avoid outside or wear a mask and have to take one allergy pill 💊 in the morning and then a different allergy pill 💊 at night. I also have to take Benadryl if i happen to eat Corn on accident. Yes, I'm one of those rare individuals allergic to corn and last i checked after a little research its banned in 38 countries.

I just asked the same question. I am at end of week one and still feel awful if I don't have prednisone in my system.

Mine can last up to 8 weeks but it depends how bad I am. Usually the normal is 3 weeks. 8-))