PRECAUTIONS: Before using 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: a certain overactive thyroid condition (thyrotoxicosis), a recent heart attack (acute myocardial infarction), adrenal gland problem (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., angina, heart failure, irregular heartbeat), high blood pressure, diabetes (diabetes mellitus), water diabetes (diabetes insipidus), other hormone disorders (e.g., decreased pituitary hormone).If you have diabetes, this drug may make it harder to control your blood sugar levels. Check your blood sugar regularly as directed by your doctor. Tell your doctor immediately if you have symptoms such as increased thirst/urination, shakiness, unusual sweating, dizziness, or hunger. Your anti-diabetic medication or diet may need to be adjusted.Before having surgery, tell your doctor or dentist that you are taking this medication.Caution is advised when using this drug in the elderly because they may be more sensitive to its effects on the heart if there is too much thyroid hormone.Caution is advised when using this drug in children because overuse may keep the child from reaching full adult height. Consult your doctor for more details.Current information shows that this drug may be used during pregnancy. Tell your doctor if you are pregnant or if you become pregnant because your dose may need to be adjusted.Small amounts of this drug pass into breast milk. While there have been no reports of harm to nursing infants, consult your doctor before breast-feeding.
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