Intense Surgery and Isotretinoin/Accutane? Slow wound healing ?

Im taking Accutane since 8 month, 2 of them on 10 mg and the rest of the 6 month I took 20 mg. I need another 4 month of accutane to reach my desired dosage. I want to get 2 surgerys next year but Im scared that my wounds are going to heal very poorly. How long should I wait after surgery? Its a sex reassigment surgery, so its going to be very intense and I want the scars to heal good.

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