If you experience symptoms such as hives, breathing difficulties, face swelling, lips swelling, tongue swelling, or throat swelling, you could be allergic to Synthroid. Get yourself emergency medical assistance at once.
Some side effects are more common than others. More common side effects include muscle weakness, anxiety, sleeping difficulty, headache, leg cramps, diarrhea, partial hair loss, and skin rash.
More uncommon side effects could be dangerous, so notify your doctor immediately if you notice quicker or irregular heartbeats, fever, sweating, hot flashes, short breaths, pain in the chest, tremors, insomnia, fatigue, weakness, muscle aches, headache, irritability, depression, memory issues, anxiety, dry skin, hair loss, vomiting, diarrhea, sudden weight changes, or changes to your menstrual cycle.
Keep in mind that this is not a total list of all the possible side effects you may experience while taking Synthroid. If you are searching for a complete list, please contact your doctor for assistance.