Mequinol to deal with dark discolorations?

Hello Drs. Over the years ive developed some discolorations on my skin and I do not want to have to keep using bleaching creams like HQ as they dont have permanent results. Are the results from Mequinol permanent? And if not how long will the results last before the skin discoloratoin comes back and I have to start the process again? Is Monobenzone the only drug that has permanent results? Thank you for your time doctors.

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