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levothyroxine
metformin
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levothyroxine ↔ metformin
Applies to: levothyroxine, metformin
MONITOR: The efficacy of oral hypoglycemic agents and insulin may be diminished by certain drugs, including thiazides and other diuretics, corticosteroids, estrogens, progestins, thyroid hormones, human growth hormone, gonadotropin-releasing hormone agonists, phenothiazines, atypical antipsychotics, sympathomimetic a