Slippery elm powder is good for many gut problems, It makes a slimy coating in the gut which Soothes food transit and allows faster healing. It is completely harmless.
I don’t know anything about backs, just check the small print on the meds for side effects
What have they done about the anaemia?. Have they checked for B12 deficiency which is a different blood rears from the general panel. Anaemia is very debilitating, and a course of injections is quicker than tablets, especially if the guts are not working properly. It causes weakness, brain fog, anxiety and confusion.