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If substances such as St. John's wort, antibiotics, or barbiturates are taken in combination with Nor-QD, drug interactions could occur. These interactions can make the birth control pill less effective, possibly increasing the risk of pregnancy. It is generally recommended to use a backup method of birth control in case a Nor-QD drug interaction is severe enough to lead to unintentional pregnancy.
Nor-QD® (norethindrone) can potentially interact with numerous other medicines. Many of these interactions can be severe enough to lead to unintentional pregnancy, and a backup method of birth control (such as condoms) may be recommended in many cases. Some of the medicines that may lead to Nor-QD drug interactions include:
- St. John's wort (Hypericum perforatum).
(Nor-QD is equivalent to Heather®, Camila®, and Nora-BE® birth control pills. The information in this article also applies to these medications.)