Uses of OC 21 Tablet
OC 21 TABLET is used for emergency contraception. It provides a safe and effective way to prevent an unintended pregnancy after unprotected sex or contraceptive failure.
OC 21 Tablet side effects
  • Edema (swelling)
  • Abdominal bloating
  • Anxiety
  • Irritability
  • Depression
  • Muscle pain
How to use OC 21 Tablet
Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. OC 21 TABLET may be taken with or without food, but it is better to take it at a fixed time.
How OC 21 Tablet works
OC 21 TABLET is a progestin (female hormones). It works to prevent pregnancy by temporarily stopping the release of an egg from the ovary, or preventing fertilization (union) of the egg by sperm. It may also alter the lining of the uterus (womb) to stop a fertilized egg from attaching to the uterus.
OC 21 Tablet related warnings
OC 21 TABLET may cause excessive drowsiness and calmness with alcohol.
OC 21 TABLET is highly unsafe to use during pregnancy.
Human and animal studies have shown significant adverse effects on the foetus. Please consult your doctor.
OC 21 TABLET is probably safe to use during lactation. Limited human data suggests that the drug does not represent a significant risk to the baby.
Nonhormonal contraceptives is preferred in breastfeeding women, especially during the first 4 weeks postpartum
It is not known whether OC 21 TABLET alters the ability to drive. Do not drive if you experience any symptoms that affect your ability to concentrate and react.
There is limited information available on the use of OC 21 TABLET in patients with kidney disease. Please consult your doctor.
There is limited information available on the use of OC 21 TABLET in patients with liver disease. Please consult your doctor.

Alternate Brands

For informational purposes only. Consult a doctor before taking any medicines.
She 72 1.5mg Tablet
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Expert Advice

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  • OC 21 TABLET is a single tablet; you only have to take 1 dose for it to work.
  • Take as soon as possible, preferably within 12 hours and not later than 72 hours (3 days) of having unprotected sex or contraceptive failure.
  • Notify your doctor if you vomit within 2 hours of taking OC 21 TABLET.
  • OC 21 TABLET is not as effective as regular methods of contraception and should be used only as an emergency measure.
  • Take a pregnancy test about a week after you take OC 21 TABLET as there is a 5-10% chance that it may not have worked.


Q. What is OC 21?
It is an emergency contraceptive tablet which is used in case of unprotected sex or contraceptive failure to prevent unwanted pregnancy.
Q. When is it appropriate to take OC 21 tablet?
You should take it only in emergency situations such as unprotected sex, contraceptive failure (eg. broken condom) or irregular use of your birth control pills.
Q. How should I take OC 21?
Take one tablet as soon as possible, not later than 72 hours of unprotected sex or contraceptive failure.
Q. How effective is OC 21?
The sooner you take it, the more effective it is. OC 21 significantly reduces your chances of becoming pregnant if used within 72 hours (3 days) after unprotected sex or contraceptive failure.
Q. What are the side effects of OC 21?
It is almost safe for all women. Some common side effects such as nausea, vomiting, headache and lower abdominal pain may occur. Your breasts may become more tender than usual. There is a possibility of unexpected vaginal bleeding, but this should clear up by the time you get your next period. Your periods may become irregular. Go for a pregnancy test if they are delayed by more than a week.
Q. Can I take OC 21 during breastfeeding?
Yes, it is safe during breastfeeding. It is unlikely to cause any significant effect on milk quantity that can affect the infant adversely.
Q. How often can I use OC 21?
It can be taken more than once in a month but it is advised only for emergency contraception. Keep using regular contraception like condoms, regular birth control pills, IUDs etc. for avoiding unwanted pregnancy.
Q. Is a pregnancy test required after taking OC 21?
Although OC 21 significantly reduces your chances of pregnancy, if your periods are delayed by more than a week, a pregnancy test is recommended. However, if you decide on continuing the pregnancy, you may do so as OC 21 does not work if pregnancy has already been established. It not cause harm to the foetus.
Q. Can OC 21 be taken for regular birth control?
No, it is not indicated for regular birth control. It is used only as an emergency measure after unprotected sex or contraceptive failure.
Q. Can OC 21 protect against Sexually Transmitted Disease (STDs) and HIV / AIDS?
No, it does not offer any protection from HIV / AIDS or other Sexually Transmitted Disease (STDs). You can use condoms to protect yourself from STDs and HIV / AIDS.
Q. What is the difference between 'emergency contraceptive pill' and 'abortion pill'?
Pregnancy starts once the fertilized egg gets attached to the lining of the uterus (womb). Abortion pills contain medicine, which hinders the development of a pregnancy after it has occurred and also alters the character of the womb lining in a way that the fertilized egg gets detached, hence causing abortion. On the other hand, emergency contraceptive pills like OC 21 contain female hormones which delay the release of egg or prevent movement of sperm towards the egg. This prevents fertilization and hence pregnancy. OC 21 does not have any effect on a fertilized egg and hence does not cause abortion.
Q. Is OC 21 effective if frequent acts of intercourse have occurred in a short duration of time?
Yes. It is effective if you have had several acts of intercourse in a short span of time. However, it is important that these acts have occurred within 72 hours before taking OC 21. Also, since there is a chance of unintended pregnancy after frequent acts of unprotected sex in the same cycle, it is advisable to use a barrier contraceptive method (e.g. condom) until the next period even after using OC 21.
Information last updated by Dr. Varun Gupta, MD Pharmacology on 1st Dec 2017.
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We do not facilitate sale of this product at present
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