Does Oral Contraceptives Interact with Levothyroxine And Liothyronine?
CDI records a moderate classification for Oral Contraceptives and Levothyroxine And Liothyronine. The stored summary is: Estrogen-containing oral contraceptives increase serum thyroxine-binding globulin, potentially decreasing free levothyroxine. Patients without functioning thyroid may require increased thyroid dose. The mechanism involves increases serum thyroxine-binding globulin. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This record was extracted from drug labeling through openFDA. NIH/NLM RxNorm is used for drug identities. The summary and severity classification are CDI's processed information, not a verbatim source quotation. Product, route, and patient circumstances matter.
- Severity
- Moderate
- Levothyroxine And Liothyronine Class
- l-Triiodothyronine
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
Recorded Mechanism
Increases serum thyroxine-binding globulin
What To Tell Your Doctor or Pharmacist
If you are taking Oral Contraceptives and your doctor is considering prescribing Levothyroxine And Liothyronine (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider