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.
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