Levothroid Oral

In Depth

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Levothroid Oral Precautions

Before taking levothyroxine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have:

overactive thyroid conditions (e.g., thyrotoxicosis)
a heart attack (acute myocardial infarction)
adrenal gland problems (e.g., uncorrected adrenal insufficiency)

Do not use thyroid drugs for weight control.

Before using this medication, tell your doctor or pharmacist your medical history, especially of:

heart problems (e.g., hypertension, congestive heart failure, arrhythmias, coronary artery disease)
diabetes
male or female infertility problems (unless caused by underactive thyroid disease)
bone loss disease (e.g., osteoporosis)
other hormone disorders (e.g., hypothalamic/pituitary hormone deficiencies, autoimmune polyglandular syndrome)
certain thyroid problems (e.g., nontoxic diffuse goiter, nodular thyroid disease)
blood clotting disorders

Notify your doctor or dentist that you are taking this medication prior to any surgery.

Caution is advised when using this drug in children because overuse may reduce the child's future adult height. Consult your doctor for details.

Caution is advised when using this drug in the elderly because they may be more sensitive to the effects of the drug.

Current information shows that this drug may be used during pregnancy. Tell your doctor if you are pregnant because your dose will have to be adjusted.

Small amounts of this drug pass into breast milk. Consult your doctor before breast-feeding.

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