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Levoxyl

Last reviewed on RxList: 9/12/2016
Levoxyl Side Effects Center
Hyperthyroidism:Keep Your Thyroid in Check

Last reviewed on RxList 9/12/2016

Levoxyl (levothyroxine sodium) Tablets is a replacement for a hormone that is normally produced by your thyroid gland used to treat hypothyroidism (low thyroid hormone). Levoxyl is also used to treat or prevent goiter (enlarged thyroid gland), which can be caused by hormone imbalances, radiation treatment, surgery, or cancer. Levoxyl is available in generic form. Common side effects of Levoxyl include hair loss during the first few months of treatment. This effect is usually temporary as your body adjusts to Levoxyl. Contact your doctor if you have serious side effects of Levoxyl including:

  • headache,
  • sleep problems (insomnia),
  • nervousness,
  • irritability,
  • fever,
  • hot flashes,
  • sweating,
  • pounding heartbeats or fluttering in your chest,
  • changes in your menstrual periods, or
  • appetite or weight changes.

Dosage of Levoxyl is individualized. Levoxyl may interact with lithium, amiodarone, antidepressants, or radiation therapy with iodine. Many other drugs can interact with Levoxyl. Tell your doctor all prescription and over-the-counter medications you use. There are other drugs that can be taken while taking Levoxyl, but they must be taken 4 hours before, or 4 hours after taking Levolxyl. Consult your doctor. Current information shows Levoxyl may be used during pregnancy. Tell your doctor if you are pregnant because your dose may need to be adjusted. This medication passes into breast milk but is unlikely to harm a nursing infant. Consult your doctor before breast-feeding.

Our Levoxyl (levothyroxine sodium) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Levoxyl Consumer Information
Hyperthyroidism:Keep Your Thyroid in Check

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • headache;
  • sleep problems (insomnia);
  • feeling nervous or irritable;
  • fever, hot flashes, sweating;
  • pounding heartbeats or fluttering in your chest;
  • changes in your menstrual periods; or
  • appetite changes, weight changes.

Less serious side effects may include mild hair loss.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Levoxyl (Levothyroxine Sodium)

Levoxyl Professional Information
Hyperthyroidism:Keep Your Thyroid in Check

SIDE EFFECTS

Adverse reactions associated with levothyroxine therapy are primarily those of hyperthyroidism due to therapeutic overdosage. They include the following:

General: fatigue, increased appetite, weight loss, heat intolerance, fever, excessive sweating;

Central nervous system: headache, hyperactivity, nervousness, anxiety, irritability, emotional lability, insomnia;

Musculoskeletal: tremors, muscle weakness;

Cardiac: palpitations, tachycardia, arrhythmias, increased pulse and blood pressure, heart failure, angina, myocardial infarction, cardiac arrest;

Pulmonary: dyspnea;

GI: diarrhea, vomiting, abdominal cramps;

Dermatologic: hair loss, flushing;

Reproductive: menstrual irregularities, impaired fertility.

Pseudotumor cerebri and slipped capital femoral epiphysis have been reported in children receiving levothyroxine therapy. Overtreatment may result in craniosynostosis in infants and premature closure of the epiphyses in children with resultant compromised adult height.

Seizures have been reported rarely with the institution of levothyroxine therapy.

Inadequate levothyroxine dosage will produce or fail to ameliorate the signs and symptoms of hypothyroidism.

Hypersensitivity reactions to inactive ingredients have occurred in patients treated with thyroid hormone products. These include urticaria, pruritus, skin rash, flushing, angioedema, various GI symptoms (abdominal pain, nausea, vomiting and diarrhea), fever, arthralgia, serum sickness and wheezing. Hypersensitivity to levothyroxine itself is not known to occur.

In addition to the above events, the following have been reported, predominately when Levoxyl tablets were not taken with water: choking, gagging, tablet stuck in throat and dysphagia (see PATIENT INFORMATION).

Read the entire FDA prescribing information for Levoxyl (Levothyroxine Sodium)

Related Resources for Levoxyl
Hyperthyroidism:Keep Your Thyroid in Check

Read the Levoxyl User Reviews »

© Levoxyl Patient Information is supplied by Cerner Multum, Inc. and Levoxyl Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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