What side effects may I notice from receiving Levothyroxine Sodium?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-anxious
-breathing problems
-changes in menstrual periods
-chest pain
-diarrhea
-excessive sweating or intolerance to heat
-fast or irregular heartbeat
-leg cramps
-nervousness
-swelling of ankles, feet, or legs
-tremors
-trouble sleeping
-vomiting
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-changes in appetite
-headache
-irritable
-nausea
-weight loss

This list may not describe all possible side effects for Levothyroxine Sodium. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.