Sorry if this is the wrong place to add this. But I am a Non smoker and have set up my husband to use an e-cig in hopes to quit. We don't have nicotine e-juice here yet (live in Canada) so he smoked his vapour e-cig during a 40 min car ride today. I got the worst head ache almost immediately and near the end of the 40 min threw up. My head felt like it was going to explode afterwards I was trying to squeeze it and put pressure on it. Couldn't wait to get home. Popped an Advil and Tylenol and passed out for 3 hours. Woke up perfectly fine. I have no doubt this was a reaction to the vapour, which I agree is totally weird. Allergy? Sensitivity? I haven't found much info on second hand side effects.