Skin Lightening Pills?

I am interested in the overall lightening of my complexion. Please do not make judgements about my desire to do so and try to understand it as a preference akin to those who go tanning to get darker. I have tried skin lightening creams with agents such as hydroquinone, arbutin, kojic acid, licorice root, etc. All have produced a slight brightening is all, nothing very noticeable.

I knew a girl whose mother got skin lightening pills from her dermotologist and it lightened her from a medium brown complexion to a white Mediterrean olive complexion. I wanted to know the name of these pills. Does any qualified dermatologist or doctor or aesthetician here know of anything like this? I understand the key to lightening the skin is through inhibiting tyrosinase; is there a pill that can achieve this?

There are websites online trying to pitch Glutathione supplements as a powerful anti-oxident with a skin lightening side effect but this is most likely bogus.