Levoxyl Side Effects

Even though most people do not experience problems when taking Levoxyl, side effects are possible. Some common side effects include insomnia, hair loss, and difficulty breathing. Side effects of Levoxyl typically occur when your dosage is too high. Because many Levoxyl side effects can be dangerous, it is important to contact your healthcare provider right away if you develop any side effects.

 

An Introduction to Levoxyl Side Effects

As with any medicine, side effects are possible with Levoxyl® (levothyroxine sodium). However, not everyone who takes the drug will experience side effects. In fact, most people tolerate it quite well.
 
(This article covers many, but not all, of the possible side effects with Levoxyl. Your healthcare provider can discuss a more complete list of side effects with you.)
 

Possible Levoxyl Side Effects

Side effects typically occur when the Levoxyl dosage is too high. Too much Levoxyl causes symptoms of an overactive thyroid (known medically as hyperthyroidism). These symptoms can be dangerous, and any of these symptoms should be reported to your healthcare provider (as they may signal that your Levoxyl dosage needs to be decreased). These side effects may include:
 
As with any medication, Levoxyl can also cause allergic reactions. Seek medical attention immediately if you develop signs of an allergic reaction, including:
 
  • An unexplained rash
  • Hives
  • Itching
  • Wheezing or difficulty breathing
  • Unexplained swelling (especially of the lips, mouth, or throat).
     
(Levoxyl Side Effects Continued: Page 2)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;