Common Side Effects

• Some of the side effects associated with using this medication include allergic reaction, skin rash, hives, difficulty breathing, tightening of the chest, and swelling of the mouth, lips and tongue. While these are considered the most common side effects of levothyroxine, they only affect a small amount of users.
  
  

Severe Side Effects

• Unfortunately, there are also a number of severe side effects associated with using this medication. Some of these side effects include sleep problems, headache, sudden weight changes, changes in appetite, sweating, fever, hot flashes, changes in menstrual cycle in females and general nervousness. These side effects are also very rare and do not affect a large amount of users.
  
  

Important Safety Information

• If you have had a heart attack, a previous thyroid disorder or an adrenal gland problem, you should not take hypothyroid medication without first consulting with your doctor. Also, before beginning treatment with this drug, speak with your doctor if you suffer from any of the following ailments: heart disease, anemia, diabetes, coronary artery disease, pituitary or adrenal gland problems, or a history or blood clots. The medication is classified as FDA category A and is considered safe to use during pregnancy.
  
  

Use

• This medication should be used exactly as it was prescribed by your doctor and never in dosages larger than what has been recommended on the label. Always take the tablet with a full glass of water and on an empty stomach (approximately 30 minutes before eating). It may take up to several weeks to see considerable improvement in your condition. As a result, it is important to continue treatment even if immediate results are not seen. Always store hypothyroid medications away from sources of moisture and at room temperature.
  
  

Warning

• If you experience any of the aforementioned side effects, contact your physician for an adjusted treatment method.
  
  If an overdose is suspected, contact the poison control center and head directly to the closest emergency room.
  
  Hypothyroid medications should never be used recreationally or without the prescription of a doctor.