Can You Take Cold Medicine After Emergency Contraceptive Pills? - Obstetrics and Gynecology

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Can I take cold medicine after taking the emergency contraceptive pill?


I had a fever and throat inflammation the day before yesterday, so the doctor prescribed me these medications.
After being intimate with my boyfriend today, I took the emergency contraceptive pill (Plan B).
Can I still take cold medicine? How long should I wait? Will there be any interactions? The medications I was prescribed are: Ponstan 500mg, Strocain 10mg, Gaster 20mg, Broain, Primalan 5mg, Curam 1000mg, Scanol 500mg, Kenalong.

zhāngyú, 10~19 year old female. Ask Date: 2017/05/21

Dr. Huang Jianzhong reply Obstetrics and Gynecology


You can take cold medicine without needing to wait a certain period of time; it will not have any adverse effects.

Reply Date: 2017/05/21

More Info


When considering the interaction between cold medicine and emergency contraceptive pills (ECPs), it's essential to understand the pharmacological properties of both types of medications. Emergency contraceptive pills, such as those containing levonorgestrel or ulipristal acetate, are designed to prevent pregnancy after unprotected intercourse. They work primarily by delaying ovulation, altering the endometrium, or preventing fertilization.
The medications you mentioned, including Ponstan (mefenamic acid), Strocain (a local anesthetic), Gaster (likely a proton pump inhibitor), Broain (an antihistamine), Primalan (an antihistamine), Curam (amoxicillin and clavulanate), Scanol (an anti-inflammatory), and Kenalong (a corticosteroid), serve various purposes, primarily for pain relief, inflammation reduction, and treating infections.
Generally, there are no significant interactions between ECPs and most over-the-counter cold medications. However, certain considerations should be taken into account:
1. Antihistamines: Medications like Broain and Primalan can cause drowsiness and may interact with other sedatives or alcohol. While they do not affect the efficacy of ECPs, it's important to be cautious about their sedative effects, especially if you need to be alert.

2. Pain Relievers: Ponstan, as a non-steroidal anti-inflammatory drug (NSAID), is typically safe to take with ECPs. However, it’s advisable to use it as directed and not exceed the recommended dosage.

3. Antibiotics: Curam (amoxicillin and clavulanate) is an antibiotic that generally does not interfere with the effectiveness of ECPs. However, some antibiotics, like rifampicin or rifabutin, can reduce the effectiveness of hormonal contraceptives, but these are not included in your list.

4. Corticosteroids: Kenalong, being a corticosteroid, is also not known to interact negatively with ECPs. However, long-term use of corticosteroids can have various side effects, so it should be used judiciously.

5. Timing: There is no specific waiting period required between taking ECPs and cold medications. You can take them concurrently, but it’s always best to follow the advice of your healthcare provider regarding the timing and dosage of any medications.

6. Consultation: If you have any concerns about the medications you are taking, especially if you are experiencing side effects or if your symptoms persist, it is advisable to consult with a healthcare professional. They can provide personalized advice based on your medical history and current health status.

In summary, you can generally take cold medicine after taking emergency contraceptive pills without significant concern for interaction. However, always adhere to the prescribed dosages and be mindful of any side effects. If in doubt, consulting with a healthcare provider is the best course of action to ensure your safety and the effectiveness of your medications.

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