Hi, @louise05 and welcome to Mayo Clinic Connect! We’re glad you found this forum also!
https://connect.mayoclinic.org/discussion/oral-lichen-planus-3/ This site talks a lot about OLP and how you can help yourself.
I didn’t find anything specific to tacrolimus just members referring to it. I’m sure other members will join the conversation soon unless they had too much fun on New Years Eve!