What if I take Isotretinoin without consulting with a doctor? What shouldn't I eat while on Isotretinoin (Accutane)?

I'm on Isotretinoin its called isoin in here in first course of isotreinoin. I was prescribed by a doctor it's 1 year from now and I'm again facing the problem of acne on my face, so I've read about it on internet and took second course by myself. I didn't consult with any doctor and I want to know if daily eating of chicken and milk can cause any reaction while on Accutane? 

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