Do Health Supplements Affect Birth Control Pills? A Medical Inquiry - Internal Medicine

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Health Supplements and Contraceptive Pills Issues


Hello, doctor.
I have some allergies and tend to experience nasal congestion in winter.
A friend bought a health supplement, "Cordyceps Sinensis capsules," from the pharmacy for me.
However, since I am also taking birth control pills, I would like to know if these two substances will interact or reduce the effectiveness of the birth control pills.
Thank you.

Fang, 20~29 year old female. Ask Date: 2020/12/09

Dr. Hong Yuanbin reply Internal Medicine


Hello, currently there is no clear evidence to suggest that these two medications interact with each other.
It is recommended to review the prescribing information for both medications; if there is no mention of interaction, the likelihood of interaction is low.
However, it is advisable to space the administration of different medications by more than one hour.
Thank you for your inquiry.

Reply Date: 2020/12/09

More Info


When considering the interaction between health supplements and birth control pills, it is essential to understand how various substances can affect the efficacy of contraceptive methods. Birth control pills, which contain hormones such as estrogen and progestin, work primarily by preventing ovulation, thickening cervical mucus, and thinning the uterine lining. Any substance that alters hormone levels or affects liver enzymes responsible for metabolizing these hormones could potentially impact the effectiveness of birth control pills.

In the case of "Cordyceps," a health supplement derived from a fungus known for its potential health benefits, including immune support and anti-inflammatory properties, there is limited research specifically addressing its interaction with hormonal contraceptives. However, it is crucial to note that some herbal supplements can influence liver enzymes, particularly cytochrome P450 enzymes, which play a significant role in the metabolism of many medications, including birth control pills.

For instance, certain herbal supplements like St. John's Wort are well-documented to induce liver enzymes, leading to decreased levels of contraceptive hormones in the bloodstream and potentially resulting in unintended pregnancies. While there is no conclusive evidence that Cordyceps has a similar effect, caution is warranted when combining any supplement with hormonal contraceptives.

Additionally, individual responses to supplements can vary widely. Factors such as dosage, the specific formulation of the supplement, and individual metabolic differences can all influence how a supplement interacts with medications. If you have allergies or are prone to respiratory issues, it is also essential to consider the potential side effects of any new supplement, as they may exacerbate your existing conditions.

Given your concerns about allergies and the potential interaction between Cordyceps and your birth control pills, it is advisable to consult with a healthcare professional. A doctor or pharmacist can provide personalized advice based on your medical history, current medications, and any other supplements you may be taking. They can also help you weigh the benefits and risks of using Cordyceps in conjunction with your contraceptive method.

In summary, while there is no definitive evidence suggesting that Cordyceps directly affects the efficacy of birth control pills, the potential for interaction exists, particularly concerning liver metabolism. It is always best to err on the side of caution and seek professional guidance when introducing new supplements into your regimen, especially when you are on hormonal contraceptives. This approach will help ensure that you maintain effective birth control while managing your health concerns safely.

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