I believe there is a non-staining brand available in the US, but don't recall the name. One of my doctors told me a number of years ago, but can't remember which doctor it was. I'm curious now, so I will ask my doctors the next time I go for a check-up.

Susan

SCC R-Lateral tongue, T1N0M0
Age 47 at Dx, non-smoker, casual drinker, HPV-
Surgery: June 2005
RT: Feb-Apr 2006
HBOT: 45 in 2008; 30 in 2013; 30 in 2022 -> Total 105!
Recurrence/Surgeries: Jan & Apr 2010
Biopsy 2/2011: Moderate dysplasia
Surgery 4/2011: Mild dysplasia
Dental issues: 2013-2025 (ORN of lower jaw)