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Levothyroxine, 2.39 / 5 (36 votes)

Levothyroxine Side Effects

levothyroxine tabletsLevothyroxine has been shown to cause serious side effects, such as:
  • dyspnea, or shortness or breath, that can signal respiratory side effects
  • tremor or muscle weakness
  • cardiovascular symptoms, such as palpitations, increased blood pressure or pulse, chest pain, and in rare cases heart attack and cardiac arrest
  • hair loss
  • flushing
  • decreased bone density
  • seizures
  • allergic reaction, which is characterized by rash, flushing, itching, swelling of the face, mouth, lips, or tongue, and difficulty breathing
Overdosage of  levothyroxine is often the culprit of most serious side effects, and it can also cause more serious complications such as shock, coma, cerebral embolism, or even death. If you experience any of these serious side effects, contact your doctor immediately. Levothyroxine may also cause common side effects, such as:
  • menstrual irregularities
  • difficulty getting pregnant