Hashimoto's disease
"Took Naturethroid successfully for 3 years, 32mcg/day. Developed Hashimotos with a small thyroid nodule. Increased dosage by 16.25 mg 2x/ week. Dr did not do a follow-up check on serum T3 levels.  Toxicity after only 6 months - weak, lung tightness - faint, developed food allergies very quickly. Scary experience which has lingering effects 1 month later. Switched Tirosint which has no fillers &amp;T4 only. Working ok so far."