Endocrine System Channel
Topics
Medications
Quicklinks
Related Channels

Levothyroxine and Insomnia

When taking levothyroxine, insomnia is a possible side effect. However, if you develop insomnia while taking levothyroxine, it may be an indication that your dosage is too high (as insomnia is a side effect of hyperthyroidism). If you are taking levothyroxine and insomnia becomes a problem, talk to your healthcare provider. He or she can recommend possible treatment options.

Does Levothyroxine Cause Insomnia?

Levothyroxine sodium is a prescription thyroid medication that is known to cause insomnia. However, the exact percentage of people who develop this side effect is not known (as is common with older medications, like levothyroxine).
 
Because insomnia may be a sign that your levothyroxine dosage is too high, you should let your healthcare provider know if you develop insomnia while taking levothyroxine. Keep in mind that it is possible that your insomnia may be completely unrelated to levothyroxine.
 

Do I Have Insomnia?

Insomnia is a common sleep disorder. Symptoms of insomnia usually include one or more of the following:
 
  • Having trouble falling asleep (often lying awake in bed for hours)
  • Waking up often during the night and having trouble going back to sleep
  • Waking up too early in the morning
  • Getting non-refreshing sleep.
     

Is Insomnia With Levothyroxine a Bad Sign?

Insomnia is a common symptom of hyperthyroidism, which can occur if your levothyroxine dose is too high. However, it is also possible that your insomnia could be completely unrelated to levothyroxine. The best way to find out if you are taking too much levothyroxine is through a simple blood test.
 
You should be aware of other symptoms of hyperthyroidism, which may also signal that your dose is too high. Some of these symptoms include:
 
  • Chest pain
  • Heart palpitations
  • High blood pressure (hypertension)
  • Rapid heart rate (tachycardia)
  • Increased appetite, along with weight loss
  • Feeling hot all the time and increased sweating
  • Fever
  • Shakiness (tremors) or muscle weakness
  • Emotional changes
  • Difficult or painful breathing
  • Diarrhea, vomiting, or abdominal cramps (stomach cramps)
  • Hair loss (see Levothyroxine and Hair Loss)
  • Flushing
  • Menstrual problems or fertility problems.
     
Type 2 Diabetes: Fact or Fiction

Levothyroxine Sodium Tablets

Referring Pages:
Terms of Use
Advertise with Us
Contact Us
About eMedTV
Privacy Policy
Copyright © 2006-2014 Clinaero, Inc.
eMedTV serves only as an informational resource. This site does not dispense medical advice or advice of any kind. Site users seeking medical advice about their specific situation should consult with their own physician. Click Terms of Use for more information.