Bappy, you can go right on taking your AD, if it helps you. I have been on one the whole time I've been on LDN, For anxiety/depression.
The jury is still out on taking narcotics, too. They did a study (don't ask me where) on using Morphine and LDN together. They say it causes you to actually use less of the morphine and yet, it still works on the pain. I took Darvocet and it worked great for my pain, while still on LDN. My Doc told me to stop the LDN, but I forgot and....it didn't matter.
Imuran is an Immune system suppressant, so, I'm not so sure of it working with LDN....it seems counterproductive to me, but, I'd ask Dr Gluck of the LDN. org. He did say it was ok to take IVSM.
Good luck..