Combined hormonal contraceptives contain two types of female hormones, estrogen and progestogen. This medication can help prevent ovulation and regulates other naturally occurring hormones in the body. When taken correctly, this prevents pregnancy and promotes regular menstrual bleeding.
There are typically two types of regimens depending on the medication you are prescribed.
This leaflet describes the combined hormonal contraceptives with a 28-day regimen, which includes:
There is no action needed if you have missed the white (inactive) tablets; however you must follow the steps below if you miss any of your 24 pink (active) tablets to ensure that the contraceptive effect is not reduced.
Within 24 hours:
Take the missed tablet as soon as you remember. Take the next tablet at your usual time.
More than 24 hours:
If the missed tablet is within
No missed tablets in the last 7 days | Take the missed tablet as soon as you remember, even if it means taking 2 tablets at the same time. Continue to take your tablets at your usual time until the pink (active) tablets are finished. Throw away the 4 white (inactive) tablets and start the next pack right away. Your menses may not come until you finish taking all the pink (active) tablets of the next pack, but there is no need to worry. However, if your menses do not occur after the next pack is finished, you should take a pregnancy test to make sure you are not pregnant. |
Missed tablets in the last 7 days | Take the missed tablet as soon as you remember, even if it means taking 2 tablets at the same time. Continue to take your tablets at your usual time until the pink (active) tablets are finished. Throw away the 4 white (inactive) tablets and start the next pack right away. Your menses may not come until you finish taking all the pink (active) tablets of the next pack, but there is no need to worry. However, if your menses do not occur after the next pack is finished, you should take a pregnancy test to make sure you are not pregnant. |
**If you miss your period (especially with missed tablets), check with your doctor to find out if you are pregnant before continuing to take the next cycle of contraceptives.
If you vomit or suffer from diarrhea within 3 to 4 hours of taking this medication, the tablet may not be absorbed. This is considered a missed dose. You should then follow the instructions above.
Inform your healthcare professional if:
Some medications including antibiotics and antifungals may affect how the medication works or be affected by the medication. Please inform your other healthcare professionals about this medication which you are taking if you are seeing them for other medical conditions.
Common side effects include:
Inform your doctor if the side effects above become severe and bother you.
Using a combined hormonal medication increases a woman’s risk of developing blood clots compared to a woman not taking any combined hormonal contraception. The risk of developing blood clot in a vein is highest during the first year a woman uses the medication. Other risk factors of developing blood clots include smoking and obesity. However, the formation of blood clot is rare and the doctor would have considered the risks against the benefits before making the recommendation.
The symptoms of blood clot may include one or more of the following:
Other rare but serious effects that you may or may not experience:
The symptoms of a drug allergy include one or more of the following:
If you experience any of these symptoms, you should stop your medication and see your healthcare professional immediately.
Pack this medication into a black trash bag and seal it tightly before throwing into the rubbish chute or bin.
Combined Hormonal Contraceptives (28-day regimen) in Mandarin Chinese
Disclaimers
If you take more than the recommended dose, please seek medical advice immediately. The information provided on this page does not replace information from your healthcare professional. Please consult your healthcare professional for more information.
This article is jointly developed by members of the National Medication Information workgroup. The workgroup consists of cluster partners (National Healthcare Group, National University Health System, and SingHealth), community pharmacies (Guardian, Unity, and Watsons), and the Pharmaceutical Society of Singapore. The content does not reflect drug availability and supply information in pharmacies and healthcare institutions. You are advised to check with the respective institutions for such information.
Last Updated on January 2021
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