Impact of Throat Infections on Contraceptive Pill Effectiveness

Drug interactions

I would like to ask if starting to take the pre-exposure prophylaxis brand Meilian will be affected by my recent tonsillitis.
I am currently taking medication for the tonsils, which includes Cephamycins (CEPHAL), Fukon (FLURBIPROFEN), TAPEPILON, and Paran (Acetaminophen).

Niming, 20~29 year old female. Ask Date: 2022/07/08

Dr. Zhang Kunmin reply Obstetrics and Gynecology

Hello,
The medications that may interact with oral contraceptives include:
1.
Antibiotics (Penicillin, Cephalosporins, Erythromycin, Sulfonamides, Bactrim, Chloramphenicol, Doxycycline) can reduce the effectiveness of oral contraceptives.
When taking these medications, alternative contraceptive methods should be employed, as they may decrease the gut flora that aids in absorption, thereby lowering the effectiveness of the contraceptive.
2.
Sedatives (Barbiturates) can increase the metabolism of oral contraceptives, reducing their effectiveness.
3.
Antiepileptic drugs (Primidone, Phenytoin, Carbamazepine) can also increase the metabolism of oral contraceptives, leading to decreased effectiveness.
4.
Antituberculosis medications (Rifampicin, Isoniazid).
5.
Antidiabetic medications (Rosiglitazone).
6.
Acetaminophen and Ascorbic acid (Vitamin C) may inhibit the metabolism of estrogen, potentially increasing its concentration in the body and leading to a higher incidence of side effects.
7.
Oral contraceptives can affect the action of anticoagulants.
8.
Smoking can increase the metabolism of oral contraceptives, reducing their effectiveness.
9.
Long-term consumption of tea or certain herbs may have additive or subtractive effects with oral contraceptives.
Additionally, any medication should be taken with water and not with beverages like tea or coffee, as this may affect the medication's efficacy.
Therefore, if you need to take any of the aforementioned medications while on contraceptives, it is advisable to use additional contraceptive measures for seven days.

Thank you! Wishing you peace and health.

Dr.
Zhang

Reply Date: 2022/07/08

More Info

When it comes to the effectiveness of contraceptive pills, particularly in the context of throat infections and the medications used to treat them, it's essential to understand the interactions between these medications and the birth control pills.
In your case, you mentioned that you are starting to take the contraceptive pill brand "玫麗安" (Merryan) and are currently dealing with a throat infection. The medications you listed include Cephanmycin, Flurbiprofen, and Acetaminophen. Let's break down the potential interactions and their implications for your contraceptive effectiveness.

1. Cephanmycin: This is an antibiotic that is generally used to treat bacterial infections. While some antibiotics can interfere with the effectiveness of hormonal contraceptives, Cephanmycin is not typically one of them. Most studies indicate that only a few specific antibiotics, such as rifampicin and rifabutin, significantly reduce the effectiveness of birth control pills. Therefore, taking Cephanmycin should not compromise the effectiveness of your contraceptive pill.

2. Flurbiprofen: This is a non-steroidal anti-inflammatory drug (NSAID) used to relieve pain and inflammation. It does not have any known interactions with hormonal contraceptives and should not affect their efficacy.

3. Acetaminophen (Paracetamol): This is a common pain reliever and fever reducer. There is no evidence to suggest that acetaminophen affects the effectiveness of birth control pills. It is generally considered safe to use alongside hormonal contraceptives.

In summary, based on the medications you are taking for your throat infection, there should be no significant impact on the effectiveness of your contraceptive pill. However, it is always prudent to use additional protection, such as condoms, during the first month of starting a new contraceptive method, as it can take some time for the hormone levels to stabilize and for the pill to reach its full effectiveness.

Additional Considerations:
- Timing of the Pill: Ensure that you take your contraceptive pill at the same time every day. Consistency is key to maintaining its effectiveness.

- Missed Doses: If you miss a dose of your contraceptive pill, follow the instructions provided with your medication. Missing pills can lead to reduced effectiveness.

- Consult Your Doctor: If you have any concerns about your medications or their interactions, it is always best to consult with your healthcare provider. They can provide personalized advice based on your health history and current medications.

Conclusion:
In conclusion, the medications you are taking for your throat infection should not affect the effectiveness of your contraceptive pill. However, if you have any doubts or experience any unusual symptoms, do not hesitate to reach out to your healthcare provider for further guidance. It's always better to be safe and ensure that you are fully protected against unintended pregnancy.

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