Accutane 2nd Course - Month 7. Is this common?

Hello, I am on my 2nd course if accutane. I went back on it for my mild/moderate acne. My skin was perfect during months 2-6, and then all of a sudden my last week of month 6 I started getting breakouts. I went to my dermatologist and he has decided to keep me on it another month. I am now in my second week of month 7, and still getting breakouts. Is this common? I am scared that it has stopped working or is giving me adverse effects. Thank You!

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