Hi Sally,
I hope this reply is not too late. I used MuGard throughout and post rads, and I think it helped. I only used the magic mouthwash a few times because for me it only helped for about 15 minutes after using it. Did you ask your doctor about guaifenesin to help with the mucositis? I was able to rent a suction pump during the period I had mucositis, and it really helped. Before that, I would be exhausted and feel nauseated after trying to cough up the mucous on my own. Have you been able to get one?