Thanks for writing to us.
Firstly it has to be seen whether you are having leucoplakia or vitiligo
Melanocyl is a psoralen
based medicine for white spots
of vitiligo. It is not prescribed for inner side of lips as chances of developing irritation is very high.
A confirmed diagnosis of leucoplakia can be made by visiting an ENT doctor. If at all it is vitiligo application of steroid and tacrolimus ointment should help.
I hope you know tobacco chewing
is injurious to health as it causes irritation of oral mucosa
and may lead to cancers. A plaque of leucoplakia may turn into cancer in a course of time.