Can you combine hydroquinone with Retin-A or do you have to apply them separately?

Question

I have a dark scar on my leg which I want to try to get rid of or lighten as much as possible. I have both Retin A .1% and hydroquinone 4%. How to I apply these two on my scar?. Do I combine them and then put it on my scar or do I have to put them separately and if so when/how? And which one do I put on first?

Jonathan Kaplan, MD, MPH · Answer

Use hydroquinone on its own in the AM. Then use both hydroquinone and Retin-A at night - doesn't matter which one goes first. You can mix it if you want. If you experience redness, sensitivity, or irritation, use the Retin-A less often.

Can you combine hydroquinone with Retin-A or do you have to apply them separately?

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