Magic mouthwash is a mouth rinse often prescribed for people with mouth sores (oral mucositis) caused by chemotherapy, radiation therapy, and some targeted therapies.It is also used for oral ...

The doctors chose to concoct a tetracaine-based mouthwash instead of a lidocaine-based version because it was found to be four times more effective, worked faster and produced a prolonged relief.

Source Reference: Sio TT, et al "Effect of doxepin mouthwash or diphenhydramine-lidocaine-antacid mouthwash vs placebo on radiotherapy-related oral mucositis pain: The Alliance A221304 randomized ...

'Magic mouthwash,' an oral rinse containing diphenhydramine, lidocaine and antacids, significantly reduced pain from oral mucositis, mouth sores, in patients receiving radiation therapy for ...

These contain Lidocaine as 5% ointment/lozenges or 10% solution spray. Another local anethetic is Benzydamine hydrochloride that is used as mouthwash or spray. It is licensed for use in children ...