<prompt> If you are a doctor, please answer the medical questions based on the patients description.i have had lots of reactions to chemicals in last few years. i went to a dentist and he ordered opalescence a teeth whitening kit. i used it was less than a minute and notices a very high allergic reaction towards it. i think it has hydrogen peroxide . i am also allergic to novacane and carbacane at the dentist office. i never had these reactions before. i was exposed to sulphuric acid in the past. i am wondering if the exposure to that chemical has made me sensitive to almost all chemicals .the reaction is serious where i end up in the emergency room.  <response>: Hi, If by allergic reaction you mean skin rashes, breathlessness-you need an oral or injectable antiallergic with an experts care. If the chemicals in opalescence Whitney has only irritated the mucus membrane of mouth which is red inflamed sensitive- -Please stop using it immediately. - you can apply a soothing agent like Boroglycerine or other brand suggested by the treating Chat Doctor. - hens forward be careful inform any treating 