This registry is a place to share positive or negative side effects of using Synthroid. If you directly experienced a side effect while using Synthroid, then we encourage you to enter it here. Please note that entries here are the experiences of individual users, and in no way means that you or anyone else will experience the same side effect, since the same medication affects people in different ways. Please always contact your physician.
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May 17th
2004
6:35 AM
stomach cramps, diarrhea, headache and muscle weakness and fever. I have been on this medication for two weeks.
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