I'm probably posting this too late- I just did a search on whether people react to accidental glutening by vomiting.
I've been gluten-free for 17 months now. Usual reaction to accidental glutening seems to be bloating and anxiety/ depression, stomach and back pain, lasts a week. It hasn't happened often- always in restaurants.
I ate out last night- Mexican restaurant. Ordered plain tamales, since their sauce contains flour. Tamales were supposedly only corn masa, ground meat. Also refried beans, rice- the rice had the typical reddish color but they said was only from spices, no sauce or wheat. The only thing I can figure is that the tortilla chips were contaminated. Generally I'm very good about this, but like an idiot.. I didnt'consider they fried their own chips. The restaurant couldnt'tell me today if other stuff was fried in the oil but I'm sure it was- they serve chile rellenos and chimichangas.. they are fried.
I woke up twice in the middle of the night, vomiting. This morning, I woke up feeling as if I were severely hung over- nausea, bloating, headache. Weight is also up a couple of pounds. (and no, I don't drink :-)
I was no longer throwing up, but felt incredibly bad- like staying in bed all day. I took a 75 mg Zantac- since my symptoms were typical gastritis symptoms, I thought it might help. It did. It's now 1:30pm and I still haven't eaten, still have headache and nausea, but not so severe. I'm actually beginning to feel hungry but I'm scared to eat at this point. Sticking to water.
I hope this helps. I've not had a reaction like this before, except to Aleve, and my doctor felt it was a gastric sensitivity to NSAIDs. It was acute gastritis, same as above but much worse. (I never had any of these gastric sensitivities before Celiac).
I was surprised to see how many people vomit after gluten exposure. I was kind of shocked by my reaction. Each time I get exposed it does seem to be a bit worse. I don't typically eat in restaurants much, it just isn't worth the worry :-((