I've taken Synthroid since 1969. The only time I had side affect...

I've taken Synthroid since 1969. The only time I had side affects was when the drug was reformulated (without my knowledge) and the dosage I was taking became Toxic to my liver. My hair started falling out, my leg muscles became enflamed and I didn't feel well. Most of the symptoms I've read here indicate incorrect dosages. Today's doctors treat lab tests more than patients' symptoms and the lab tests most doctors use don't reveal whether T4 properly converts to T3. Typically, they run a TSH and if you're lucky, they might throw in a T4. There are many other drugs on the market that block T4-T3 conversion (i.e. birth control and anti depressentants type medications are two of the big ones) as well as other environmental factors. Clinical studies have proven that soy protein blocks thyroid hormone production/obsorption at the cellular level. It's hard to find food products today that aren't loaded with soy. Don't take my word for it though. Research for yourselves. Hair loss can be caused by too much, too little or Synthroid not actually working at all due to other factors. Good Luck! At least everyone here was diagnosed as having a problem. There are millions out there that go undiagnosed who are suffering from much worse symptoms than us.