From the sounds of it, your husband's conditions hasn't been monitored well. He needs to get in to see a doctor, preferably an Endocrinologist or Internist.
"Hutch?" I wonder if what he meant was Hashimotos [hypothyroidism].
Thyroid dysfunction (outside transient) needs to be treated for life. Your husband needs to be seen by a doctor and thyroid testing done: TSH, FT3 and FT4.
Thyriod dysfunction certainly can disrupt mood and a sense of well being (or lack thereof).
Get him into the doctor's office ASAP. In making an appointment, let the receptionist know that your husband discontinued medication 2 weeks ago.
Best,
~Kate
Would talk to an endocrinologist. Usually in cases when someone comes in and asks if they really need the medication, I will look at thyroid antibodies, ultrasound and thyroid function tests (TSH, T4, T3) on the medication -- or in his case 2-3 weeks without medication. In many cases the medication is not needed. I have no idea what is meant by a hutch back -- it may be a dowager's hump like in osteoporosis but this is not common in hypothyroid or like cretinism which only happens usually with untreated congenital hypothyroidism.
A good endocrinologist should be able to explain why he needs the medication and if he is really hypothyroid -- in which case he would certainly need to stay on medication (w/ proper dose monitoring).