Posted 2/14/2013 10:54 PM (GMT 0)
I was told by my GI that because allpurinol inhibits 6mp breakdown, that it is commonly used to permit a lower (longer lasting) dose of 6mp - especially if higher doses of 6mp were elevating liver enzymes.
Best to discuss any concern with the prescriber. Specifically ask if it is needed, ask abotu possible effects and interaction ... etc.