I currently take cholestyramine 4 times daily. Dr ordered me vitamin d2 50,000 a week for being majorly deficient in v-d. Should I be taking vitamin d3 instead? Also, am vitamin deficient n b12, a, e, and k. I have IBS-d severely and also take lesion, hydrocil, fiborcon, lomotil, flexeril, doxepin, lorazapam, and probiotics. Also take 60mg previcid daily for 10 years now. Just found out my kidneys are not functioning fully, and now have very high blood pressure. Will the previcid effect my kidneys?