Hydroquinone for Asian skin lightening?

I've been recommended 4% hydroquinone (to be applied to my whole face) each night in combination with vitamin C serum every morning with adequate sun protection for skin lightening. I am asian, and reading about the side effects of the hydroquinone and how some recommend not to use it for the whole face, I'm a bit anxious. I've only done this for a week, should I continue or go back for a refund? Thank you