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"Thyroid; what are the symptoms of too high a dose of Synthroid?"

Symptoms of an elevated dose of Synthroid can include insomnia, tremors, hair loss, weight loss despite increased appetite, palpitations/arrhythmias, diarrhea, weakness/fatigue, intolerance to heat, and irritability/nervousness. If you are experiencing any of these symptoms, it may be a good idea to discuss the situation with your doctor. It is also recommended to have regular TSH checks to monitor your Synthroid dosage.