Thanks for writing in to Healthcare Magic!
Klabax is Clarithromycin
and is does not appear as a cause for your raw area.
I think you have some problem at the local area like candida or viral/bacterial infection that is causing all the trouble.
You should get a local examination by a physician and get a sample tested from the local site if there is a discharge.
Probably you would require antibiotic treatment to get cured.
If you have any further query please let me know I would try to answer it for you.
Wish you a great health!