Helped Over 500,000 patients with 98%+ satisfaction.

Connect & Get Personalized 1-to-1 Answers from Expert Doctors

DoctorSpring > Question Home

Cerazette and onset of protection

Resolved Question:

I have just started taking Cerazette Mini Pill, if taken correctly how long does it take to become effective? I have been using condoms with my long term boyfriend. I would love to have 'safe sex' without condoms for Christmas with my boyfriend.

Category: Family Physician-GP

Ask Your Own Question

Category: HIV- AIDS Specialist
 26 Doctors Online


Thank you for asking your query at DoctorSpring.

Cerazette is a Progestogen only pill (mini pill) used for contraception. Its effectiveness starts immediately. (Once you start the pill you are safe) So in a day or two after starting the pill you can have sex without condoms. Do note that this pill will prevent pregnancy, but not STDs.

Also note :

* There are NO break days - The pill should be taken everyday to be effective.
* If you miss the pill (or there is a delay more than 12 hour) it might not be effective
* It's better to take the pill same time every day.

Hope this helps
Feel free to ask followups
Thank you

Patient replied :

I have read and heard conflicting advice and guidelines from different sources including my own GP, Many are saying that it can take 2 to 3 weeks to take effect if it is my first time taking it. I didn't start the pill on my period, I know that can sometimes cause a delay in taking effect. I started my course of Cerazette about 3 days after my period ended.

Other conflicting information I've heard is that there is only a 3 hour window where I can take the pill 'late' instead of the usual 12 hours with other types of pill.

I just don't want to end up in a unnecessary situation because I didn't ask enough questions. Thank You.


Please allow me to quote the product guideline here :


3.1 When and how to take the tablets?

Each strip of Cerazette contains 28 tablets – 4 weeks supply.
• Take your tablet each day at about the sametime. Swallow the tablet whole, with
• Arrows are printed on the front of the strip, between the tablets. The days of the week are
printed on the back of the strip. Each day corresponds with one tablet.
• Every time you start a new strip of Cerazette, take a tablet from the top row. Don’t start
with just any tablet. For example if you start on a Wednesday, you must take the tablet
from the top row marked (on the back) with WED.
• Continue to take one tablet every day until the pack is empty, always following the
direction indicated by the arrows. By looking at the back of your pack you can easily
check if you have already taken your tablet on a particular day.
• You may have some vaginal bleeding during the use of Cerazette, (See Section 4 Side
Effects) but you must continue to take your tablets as normal.
• When a strip is empty, you must start with a new strip of Cerazette on the next day -
without interruption and without waiting for a bleed.

3.2 Starting your first pack of Cerazette

• If you are not using hormonal contraception at present (or in the past month)
Wait for your period to begin. On the first day of your period take the first Cerazette tablet. Additional contraceptive precautions are not necessary. If you take your first tablet on days 2-5 of your period use an additional barrier method of contraception for the first 7 days of tablet-taking.

3.3 If you forget to take Cerazette

• If you areless than 12 hours late:
- Take the missed tablet as soon as you remember and take the next one at the
usual time. Cerazette will still protect you from pregnancy.
• If you aremore than 12 hours late:
- If you are more than 12 hours late in taking any tablet, you may not be
completely protected against pregnancy. The more consecutive tablets you
have missed, the higher the risk that you might fall pregnant.
- Take a tablet as soon as you remember and take the next one at the usual time.
This may mean taking two in one day. This is not harmful. (If you have forgotten
more than one tablet you don’t need to take the earlier missed ones). Continue to
take your tablets as usual but you must also use an extra method, such as a
condom, for the next 7 days.
- If you are more than 12 hours late taking your tablet and have had sex it is safe to
use emergency contraception;please consult your pharmacist or doctor.
- If you missed one or more tablets in the very first week of tablet-intake and had
intercourse in the week before missing the tablets, you may fall pregnant. Ask
your doctor for advice.


So basically - (1) you can start on first day of your periods and you will be protected immediately. (2) ONLY if If you take your first tablet on days 2-5 of your period use an additional barrier method of contraception for the first 7 days of tablet-taking. - Since you have already started it does not wait. (3) The maximum missed duration can be upto 12 hours.

Here is the product information -

Hope this clarifies
Feel free to ask followups questions

Dr. Jaydeep Tripathy
Category: HIV- AIDS Specialist
MBBS from Sri Ramachandra University in December 2011
M.Med (Family Medicine) - TNMGR University, Chennai
MBA-MPH in Public Health in March 2016, SRM University
Finished AFIH in March 2016, SRM University
MRCP ( UK ), Internal Medicine, Royal College of Physicians, June 2016
Fellowship in Diabetology from Martin Luther University in January 2017

Currently Resident Physician, in MD Radiodiagnosis - Kamakshi Memorial Hospital, Chennai
Dr. Jaydeep Tripathy and 4 other Medical Specialists are ready to help you

Users who read this, also read:

Make informed and better medical decisions.

Join the 500,000 people who found a smarter, quicker way to get Answers, Recommendations & Expert Opinions.

Expert Doctors at fingertips

Recommendation on next step. Second-opinion.Multi-specialty.

Save Time

Average time for answers: 6 hours.

Save Money

$35 for typical specialist consult vs. $120 for a local appointment.

Free Follow-ups

Clarify, ask further questions for free in private conversation.

100% Satisfaction

Money back guarantee for the 1st reply. MEDNET Quality Board.

Start My Consultation



Doctor Spring is a novel online Doctor consultation platform where you can get your medical questions answered by leading Doctors. Just Submit your question and rest assured that you will consult a Doctor easily. Once you submit the question, the Doctor from the concerned specialty will reply within hours. You can always ask more questions or add details with follow-up question options and make it an online doctor chat. You may use this service to consult a specialty or for getting medical second opinion. All paid services come with a MEDNET quality assurance and 100% money back guarantee.

DoctorSpring in news