Decrease sensitivity during whitening with desensitizing gels or toothpaste consisting of potassium nitrate or fluoride
https://www.mediafire.com/file/mf0bnzln5t9b8h0/pdf-29110-52283.pdf/file
Reduce sensitivity throughout whitening with desensitizing gels or toothpaste containing potassium nitrate or fluoride, and follow rest days between sessions if needed.