question: My daughter is 21. She seems to have an allergic reaction to paracetamol. She has taken it in the past and become violently ill shortly afterwards. Yesterday she took an OTC product containing 500mg paracetamol, although she had not checked the label before taking. Again she was violently ill. This seems to be very unusual, I guess she will just have to avoid this drug in the future, and read labels on ITC PRODUCTS CAREFULLY.