I went to a dermatologist because my face becoming dark so he told me that you have pimples so for that I will give tablets use it for 6 week but I do not have much pimple he gave me isotretinoin glotret 20 and isopil 30 to use with biluma cream and episoft moisturizer now I am use for a week my face more dark than before and very dry my lips and mouth are very dry so please suggest me whether I have to continue to use these tablets are to stop please give me needful reply.