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Plan B

Plan B

Levonorgestrel

Plan B (Levonorgestrel) belongs to the family of medications known as progestins. Progestins are female sex hormones that are used in birth control pills and often in combination with the hormone estrogen.

Available form

Tablet

Dosage

0.75mg, 1.5mg

Manufacturers

Actavis Group, Apotex, Bayer, Famy Care, Foundation Consumer, Laboratoire Hra Pharma, Lupin, Paladin Labs, Perrigo International, Teva

Generic brand of

Levonorgestrel

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Plan B information

Dosage

Side Effects

Available Form

Contraindications

Precautions

Warnings

The 1.5 mg tablet contained in the kit should be taken as soon as possible within 72 hours of unprotected sexual intercourse. The medication is most effective if taken within 12-24 hours of unprotected sexual intercourse.

Because Plan B (Levonorgestrel) is often associated with nausea, your doctor may also want you to take medication to prevent nausea at the same time as taking these pills. If you vomit within 2 hours of taking the tablet, you should contact your health care provider as you may need to take another dose. Plan B (Levonorgestrel) can be used at any time during the menstrual cycle. It can be taken with or without food. Taking it with food may help reduce the nausea.

Most women have their expected menstrual period within 7 days of their normal time after using this medication. If you don't have your menstrual period within 7 days of when it is expected, you should have a pregnancy test done.

Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.

It is important to take this medication exactly as recommended by your doctor. Plan B (Levonorgestrel) is not intended to be used routinely as birth control.

Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.

There may be an interaction between Plan B (Levonorgestrel) and any of the following:

acitretin
antibiotics (ampicillin, cotrimoxazole, Tetracycline, clarithromycin)
Apixaban
Aprepitant
barbiturates (e.g., pentobarbital, Phenobarbital)
Bosentan
cannabis
Carbamazepine
Cholestyramine
Colestipol
Clobazam
Cobicistat
Cyclosporine
dabigatran
Dabrafenib
darunavir
Deferasirox
diabetes medications (e.g., Canagliflozin, Glyburide, insulin, Metformin, Rosiglitazone)
Edoxaban
efavirenz
Eslicarbazepine
Exenatide
fosaprepitant
fosphenytoin
Heparin
HIV protease inhibitors (e.g., atazanavir, indinavir, ritonavir, saquinavir)
Isotretinoin
Lamotrigine
low-molecular-weight heparins (e.g., Dalteparin, Enoxaparin, Tinzaparin)
lumacaftor and Ivacaftor
mifepristone
Modafinil
mycophenolate
nevirapine
Octreotide
Oxcarbazepine
Perampanel
Phenytoin
primidone
rifampin
rifabutin
Rivaroxaban
St. John's wort
Sarilumab
Selegiline
siltuximab
thalidomide
Tocilizumab
Topiramate
Tranexamic acid
Triazolam
tretinoin
Ulipristal
Voriconazole
Warfarin

Because only one tablet of Plan B (Levonorgestrel) is taken, the effects of these medications on how the Plan B (Levonorgestrel) works is likely to be minimal. If you are taking any of these medications, speak with your doctor or pharmacist. Depending on your specific circumstances, your doctor may want you to:

stop taking one of the medications,
change one of the medications to another,
change how you are taking one or both of the medications, or
leave everything as is.

An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed.

Medications other than those listed above may interact with Plan B (Levonorgestrel). Tell your doctor or prescriber about all prescription, over-the-counter (non-prescription), and herbal medications that you are taking. Also tell them about any supplements you take. Since caffeine, decongestants, alcohol, the Nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them.

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All material © 1996-2025 MediResource Inc. Terms and conditions of use. The contents herein are for informational purposes only. Always seek the advice of your physician or other qualified health providers with any questions you may have regarding a medical condition.

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