How To Get Rid Of Pigmentation On Face?

hello gud eve sir ,, my self ajay am a 24 years old guy in business,, since from 2 years i have been facing with a big problem which is pigmantation on face,, i visited to lot of doctors and used so many medicines ,, finally i found a gud doctor n refered me to use OXYDON PLUS TABLETS & MELALITE XL cream it's has showd gud reselt when only apply crean n ate tablets it self if i give some break for 10 days or more again the problem comes as use al.
and i heard some where n told me lot of friends that dont eat tablets for many days and lot,, so that im scared for that n stopped to eat tablets freom last few months i founded white beard on my cheeks plz help me sir im going in to depression for white beard n pigmentation skin,, plzz sir