Starting Accutane on a sensitive stomach - EO's and Vitamins OK?

I'm starting accutane in one month. My stomach is already sensitive so I am virtually dairy and wheat-free, eat lots of fruits and veggies, and drink water. What EO's, vitamins, etc would be good to build my system before I start and continue with treatment? I use doTERRA oils (PB Assist, Zendocrine), collagen from Costco, and various probiotics and acidophilus with a daily vitamin routine (B complex, vit d, lysine for cold sores). Help?

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