Girls, who took methadone? And how did you stop it? What dose? Can you…

Girls, who took methadone? And how did you stop it? What dose? Can you just stop taking it all at once? It's just a medication, and I want to stop it on my own because of the rash on my face, hair all over my body... ?? and the doctor doesn't want to stop it, I'm already taking Duoflon, I think it will be enough.