Will Scabies Treatment Affect the Effectiveness of Birth Control Pills? - Pharmacology

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Hello, I am currently taking the oral contraceptive pill "Hsin-Wu-Ning." Recently, I was infected with scabies and am being treated with "Xijia" and some other medications.
However, I lost the prescription and don't know what medications the doctor prescribed, only that most of them are for itching relief.
I am concerned whether taking these scabies medications will affect the efficacy of the oral contraceptive pill.

Chen, 20~29 year old female. Ask Date: 2020/01/18

Dr. Hou Fangmin reply Pharmacology


Hello Ms.
Chen,
1.
The medications Xin Wu Ning sugar-coated tablets and scabies treatments such as Permethrin, Lindane, and Benzyl benzoate, as well as antihistamines for itching, have been checked and found to have no interactions.
However, taking iron supplements may reduce the absorption of the iron.
Additionally, if you are taking anxiolytics or anticonvulsants, you should be cautious of potential interactions.
2.
It is crucial to treat scabies seriously as it is highly contagious.
Pregnant women, premature infants, and patients with difficult-to-control epilepsy are at risk due to systemic toxicity and teratogenicity (the safety classification for medications during pregnancy is Category C), making it an absolute contraindication in clinical practice.
The use of Lindane is also contraindicated in patients with crusted scabies.
Therefore, pregnant women should not apply scabies ointments.
This is a challenging situation that requires diligent treatment.
Wishing you a Happy New Year filled with peace and joy.

Reply Date: 2020/01/18

More Info


When it comes to the interaction between scabies treatment and the effectiveness of birth control pills, it’s essential to understand the types of medications typically used for treating scabies and how they may interact with hormonal contraceptives.

Scabies is commonly treated with topical medications such as permethrin cream or oral medications like ivermectin. Permethrin is a topical insecticide that works by killing the mites and their eggs, while ivermectin is an antiparasitic that is taken orally. Both of these treatments are generally considered safe and effective for managing scabies infestations.

The primary concern regarding the interaction between scabies treatments and birth control pills lies with the oral medications. However, current evidence suggests that neither permethrin nor ivermectin significantly affects the efficacy of hormonal contraceptives. Birth control pills work by maintaining stable hormone levels in the body, primarily estrogen and progestin, to prevent ovulation. The mechanism of action of scabies treatments does not interfere with this hormonal regulation.

It is important to note that some medications can potentially interact with hormonal contraceptives, particularly certain antibiotics and anticonvulsants. These drugs can induce liver enzymes that metabolize contraceptive hormones, potentially reducing their effectiveness. However, the medications used for scabies do not fall into this category.

If you are using topical treatments like permethrin, there is no need to worry about any impact on your birth control pills. If you are prescribed ivermectin, it is also unlikely to affect the effectiveness of your contraceptive method. However, if you have any concerns or experience any unusual symptoms, it is always best to consult with your healthcare provider for personalized advice.

Additionally, it is crucial to ensure that you are using your birth control pills correctly and consistently, as this is the most effective way to prevent unintended pregnancy. If you are ever unsure about potential interactions between medications, keeping an open line of communication with your healthcare provider is key. They can provide you with the most accurate information based on your specific situation and the medications you are taking.

In summary, the treatment for scabies, whether topical or oral, is not expected to interfere with the effectiveness of birth control pills. However, if you have any lingering concerns or if you experience any side effects from your scabies treatment, do not hesitate to reach out to your healthcare provider for further clarification and guidance. Your health and peace of mind are paramount, and your provider can help ensure that both your scabies treatment and birth control are managed effectively.

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