This medication is used by women to prevent pregnancy after birth control failure (such as a broken condom) or unprotected sex. It is a progestin hormone that prevents pregnancy by preventing the release of an egg (ovulation) and changing the womb and cervical mucus to make it more difficult for an egg to meet sperm (fertilization) or attach to the wall of the womb (implantation).
This medication may not work well in women over a certain weight (for example, greater than 164 pounds or 74 kilograms). Talk to your doctor for more details and to see if this medication is right for you.
This medication should not be used as a regular form of birth control.
Check the ingredients on the label even if you have used the product before. The manufacturer may have changed the ingredients. Also, products with similar names may contain different ingredients meant for different purposes. Taking the wrong product could harm you.
Follow all directions on the product package. Take 1 tablet by mouth as soon as possible after unprotected sex. This medication works best when it is taken within 72 hours (3 days) after unprotected sex. If your doctor has prescribed this medication, take it as directed. If you are uncertain about any of the information, consult your doctor or pharmacist.
If you vomit within 2 hours of taking this medication, contact your doctor to discuss whether you need to repeat the dose.
The amount and timing of your period may be irregular after taking this medication. Tell your doctor immediately if your period is more than 7 days late. You may need to take a pregnancy test.
If you think you may have a serious medical problem, get medical help right away.
Nausea/vomiting, abdominal pain, tiredness, dizziness, changes in vaginal bleeding, breast tenderness, or headache may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: lower abdominal pain.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Before taking levonorgestrel, tell your doctor or pharmacist if you are allergic to it; or to other progestins (such as norethindrone); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
If you have any of the following health problems, consult your doctor or pharmacist before using this medication: unexplained vaginal bleeding, current or suspected pregnancy, diabetes, migraine headaches.
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
If you have diabetes, this medication may make it harder to control your blood sugar levels. Monitor your blood sugar regularly as directed by your doctor. Tell your doctor the results and any symptoms such as increased thirst/urination. Your anti-diabetic medication or diet may need to be adjusted.
This medication should not be used during pregnancy. If you become pregnant or think you may be pregnant, inform your doctor immediately.
This medication passes into breast milk. Though there have been no reports of harm to nursing infants, consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include: drugs affecting liver enzymes that remove levonorgestrel from your body (such as bosentan, griseofulvin, modafinil, nevirapine, St. John's wort, HIV protease inhibitors including ritonavir, rifamycins including rifabutin, anti-seizure medicines including carbamazepine, phenytoin, phenobarbital).
Overdose with this medication is very unlikely. However, if overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: severe nausea/vomiting.
Keep all regular medical and laboratory appointments.
Store at room temperature away from light and moisture. Do not store in the bathroom. Different brands of this medication have different storage needs. Check the product package for instructions on how to store your brand, or ask your pharmacist. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised April 2014. Copyright(c) 2014 First Databank, Inc.
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