It is well known that clonidine lowers adrenalin, and Ray has written about it. It looks like clonidine is also able to restrain the other side of the sympathetic stress response - the ACTH, cortisol, hyperglycemia process. All studies below are in humans. So, it looks like clonidine may be a good option for stopping the stress response in people who have trouble regulating it with just sugar, salt and protein. There are quite a few studies showing benefit from short-term low-dose clonidine administration on stress paramaters induced by events like surgery, septic shock, trauma, etc. Average duration is about 3-5 days. So, a possible protocol would be to take 100mcg - 200mcg clonidine before bed for 3-5 days to keep cortisol and adrenalin at bay, which should give the body a break and allow for thyroid to take over.
http://www.ncbi.nlm.nih.gov/pubmed/10949540
http://www.ncbi.nlm.nih.gov/pubmed/6302442
http://www.ncbi.nlm.nih.gov/pubmed/4011650
http://www.ncbi.nlm.nih.gov/pubmed/2847928
http://www.ncbi.nlm.nih.gov/pubmed/9579500
http://www.ncbi.nlm.nih.gov/pubmed/11546715
http://www.ncbi.nlm.nih.gov/pubmed/8218604
http://www.ncbi.nlm.nih.gov/pubmed/10949540
http://www.ncbi.nlm.nih.gov/pubmed/6302442
http://www.ncbi.nlm.nih.gov/pubmed/4011650
http://www.ncbi.nlm.nih.gov/pubmed/2847928
http://www.ncbi.nlm.nih.gov/pubmed/9579500
http://www.ncbi.nlm.nih.gov/pubmed/11546715
http://www.ncbi.nlm.nih.gov/pubmed/8218604