J.L.
I don't have an allergist but for my daughters dairy issues we have her take Digestive Advantage once daily childrens lactose intolerance therapy. You can find it in the grocery stores or wal mart. One pill she chews in the morning and we have no problems with dairy. I am also lactose intolerant and take the adult version once a day. This has been a life saver for us since I used to take pills with every meal!
Good Luck
J.