Does Taking Digestive Enzymes Affect Birth Control Pill Effectiveness? - Obstetrics and Gynecology

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Emergency contraceptive pills enzymes


Hello, doctor.
I am currently taking the oral contraceptive "Yueji." Today at 5:30 PM, I took a product similar to an enzyme called "Shenxianzi" to help with bowel movements.
I had diarrhea at 7:30 PM and 10:00 PM, and then took the oral contraceptive again at 10:20 PM.
I would like to ask: 1.
Will this affect the absorption of the oral contraceptive and its effectiveness? Do I need to take additional contraceptive measures? 2.
Additionally, if I take a product to aid bowel movements, as long as I do not have diarrhea within 3 to 4 hours after taking the oral contraceptive, it will not affect its effectiveness, correct? The ingredients of Shenxianzi include: maltodextrin, soybean extract, psyllium husk, cassia seeds, fructose, lemon powder, citric acid, small mountain grape root, spirulina powder, and antioxidants (vitamin C).

Ruby, 20~29 year old female. Ask Date: 2022/04/10

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, it should not have any impact.
Wishing you good health.

Reply Date: 2022/04/10

More Info


When it comes to the effectiveness of birth control pills and the potential impact of digestive enzymes or laxatives, it's important to understand how these substances interact within the body.
1. Impact on Birth Control Pill Effectiveness: The primary concern with birth control pills, such as "Yue Ji," is whether any substance taken can interfere with their absorption or efficacy. Generally, digestive enzymes and fiber supplements, like the one you mentioned ("神纖子"), do not directly affect the absorption of hormonal contraceptives. However, if you experience diarrhea shortly after taking your birth control pill, this could potentially reduce its effectiveness. The key factor is the timing of the bowel movement in relation to when you took the pill. If you had a bowel movement within 2-3 hours after taking the pill, it might not have been fully absorbed, which could lead to a reduced contraceptive effect.
2. Timing of Bowel Movements: As a rule of thumb, if you do not have a bowel movement within 3-4 hours after taking your birth control pill, the likelihood of it affecting the pill's effectiveness is minimal. This means that if you took your pill at 10:20 PM and did not have a bowel movement until later, your pill should still be effective. However, if you experienced diarrhea shortly after taking the pill, it is advisable to use an additional form of contraception, such as condoms, for the remainder of the cycle to ensure protection against unintended pregnancy.

3. Digestive Enzymes and Their Ingredients: The ingredients in "神纖子," such as psyllium husk and other herbal components, are primarily aimed at promoting digestive health and regularity. While these ingredients are generally safe, they can cause gastrointestinal disturbances in some individuals, leading to diarrhea or cramping. If you find that these products consistently cause digestive issues, it may be worth consulting with a healthcare provider to explore alternative options that do not interfere with your digestive system.

4. General Recommendations: If you are concerned about the effectiveness of your birth control method, consider keeping a log of when you take your pills and any digestive issues you experience. This can help you and your healthcare provider assess any patterns or issues that may arise. Additionally, if you frequently experience digestive problems, it may be beneficial to discuss this with a healthcare professional who can provide tailored advice and possibly recommend a different approach to managing your digestive health without compromising your contraceptive method.

In summary, while digestive enzymes and fiber supplements generally do not affect the absorption of birth control pills, any significant gastrointestinal distress, such as diarrhea shortly after taking the pill, could potentially reduce its effectiveness. It's always best to err on the side of caution and use additional contraceptive measures if you have any doubts about the effectiveness of your birth control pill due to digestive issues. If you have ongoing concerns, consulting with a healthcare provider is recommended for personalized advice and reassurance.

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