How long before fractional co2 should one stop the use of retin A?

Fractional co2 laser is an excellent choice for most skin types, especially when the skin is prepped with Melarase creams and retinoids. Best, Dr. KaramanoukianRealself100 Surgeon

Thank you for your question,
I usually recommend to stop it 3-5 days before the laser treatment, but it all depend on your type of skin or the condition/issue your are trying to improve. Make sure you consult a trained Board Certified Plastic Surgeon or Dermatologist.
Best Wishes
Dr Genevieve F.Caron, Board Certified Plastic Surgeon
Montreal, Canada

I ask my patients to stop using Retin A at least 72 hours before we perform the CO2 and not to resume it for 4 - 6 weeks afterwards.  The fractional CO2 definitely has less risk than the fully ablative CO2 does.  However, the darker your skin, the more chances you have of pigment changes with any laser.  I assume you are getting the procedure done by a physician who specializes in aesthetic medicine.  I would discuss your concerns with them.