I also have hypothyroidism (hashimotos). I take synthroid 100mg since 1995, Victoza injection, januvia
, and hazaar and b12 2000 mg sublingual, b9, and biotin for the last year. I went to a dentist and a salivary gland specialist and they don't think it's a big deal! The ent prescribed rubinol to dry up the saliva which I haven't taken yet. I have even thought about making my front 6 teeth longer to keep from spitting on people when I talk!