Thyroid Hormone Replacement Drugs and Birth Control Pills: A Safe Combo?

What Can I Do?

Get yourself a knowledgeable physician who understands the complex relationship between estrogen and thyroid hormones. Your physician should monitor your thyroid levels and how any medications, including oral contraceptives, are affecting them, and adjust your dosage accordingly.

All of your doctors must know all of the medications you are taking -- no "ifs, ands, or buts" about it, says Dr. Holtorf . Your doctors don't exchange all of their medical records about you each time there's an update, so unless you tell them your current list of medications, your physicians don't know what drug interactions to look out for.

Although changes in T4 hormones from estrogen-containing oral contraceptives are not dangerous, you may want to avoid them altogether by using a birth control pill that doesn't contain estrogen, Dr. Wilcox says. Keep in mind, however, that progesterone-only birth control pills are not as effective as those that contain estrogen and progesterone, and have to be taken at the same time every day. Alternatively, you can use a different form of birth control altogether.

Copyright & copy 2011 Meredith Corporation.

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