One point to consider is the source of the problem. We have found that thyroditis is a major cause of thyroid problems, and your story about hypothroid problems is not uncommon. You should consider this, especially if you have other signs/symptoms that could suggest one or more chronic infections.
Prof. Garth Nicolson
I HAVE BEEN DEALING WITH HYPOTHYROIDISM FOR 6 YEARS NOW. LEVOTHYROXINE IS A SYNTHETIC DRUG. THEY PLAYED AROUND WITH THE DOSAGE FOR A COUPLE OF YEARS. I WAS GOING TO THE DOC EVERY 3 MONTHS FOR A BLOOD DRAW. THEY FINALLY CHANGED MY MED OVER TO A REAL HARMONE EXTRACTED FROM PIGS. THE NAME OF IT IS THYROID. IT IS MADE BY A COMPANY NAMED ARMOUR. I STILL HAVE TO BE ADJUSTED EVERY ONCE IN A WHILE BUT IT HAS DONE BETTER FOR ME THAN THE OTHER. I WOULD ASK ABOUT BEING PUT ON THE REAL DEAL INSTEAD OF A SYNTHETIC DRUG.