What are the best pills for skin whitening?

There are no pills you can take for skin whitening. There are prescriptions like hydroquinone, but those are for small concentrated areas only. There is nothing to lighten all the skin evenly in a pill or topical. "This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."