Plan B Emergency Contraceptive (Levonorgestrel) Medication


Plan B Emergency Contraceptive (Levonorgestrel)

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Plan B Emergency Contraceptive, also known as the morning-after pill, is indicated to prevent pregnancy following unprotected sexual intercourse or the inadequacy of other birth control methods (such as condom rupture or forgetting two or more birth control pills). 

As a progestin, Plan B Emergency Contraceptive functions by inhibiting ovulation (egg release) or preventing the sperm from fertilizing the egg. It can also alter the lining of the uterus to prevent pregnancy from occurring. 

This medication may help prevent pregnancy but does not offer protection against transmitting the human immunodeficiency virus (HIV) and other sexually transmitted diseases (STDs). 

Uses and Dosage 

Before taking Plan B Emergency Contraceptive and every time you get a refill, carefully review its medication guide and patient information leaflet 

Adhere to the instructions provided on the prescription label. Consult your doctor or pharmacist for clarification if you have any doubts or queries. 

Plan B Emergency Contraceptive should be taken promptly, within 72 hours (3 days) following unprotected intercourse. Its effectiveness improves with earlier intake, ideally within 24 hours. 

If vomiting occurs within two hours of taking this medication, contact your healthcare provider to determine whether it is necessary to repeat the dose. 

After taking Plan B Emergency Contraceptive, continue with your current birth control method or start using regular birth control immediately, as pregnancy can still occur soon after treatment. 

Schedule a doctor’s appointment within three weeks of taking Plan B Emergency Contraceptive to ensure there are no harmful effects and to confirm that you are not pregnant. 

Side Effects 

Listed below are the potential adverse effects of Plan B Emergency Contraceptive. If any of them last or worsen, inform your healthcare provider promptly.  

Common Side Effects 

  • Stomach pain 
  • Breast pain or tenderness 
  • Nausea 
  • Vomiting 
  • Diarrhea 
  • Headache 
  • Dizziness 
  • Fatigue 
  • Changes in menstrual periods, such as earlier or later than expected 

Serious Side Effects 

Contact your physician or seek urgent medical assistance if you experience intense pain in your lower abdomen or side. This may indicate a tubal pregnancy, where the fertilized egg implants in the fallopian tube rather than the uterus. 

Allergic Reactions 

Although rare, a severe allergic reaction to Plan B Emergency Contraceptive may occur. Seek prompt medical help if any signs of a severe allergic reaction are observed, such as: 

  • Hives 
  • Difficulty breathing 
  • Swelling (face, lips, tongue, or throat) 

Not all side effects of Plan B Emergency Contraceptive are included in this list. Tell your doctor right away if any unlisted effects occur. 


Plan B Emergency Contraceptive is not guaranteed against pregnancy if you engage in unprotected sex afterward. To prevent pregnancy, take this medication immediately after unprotected sex and use contraception during sexual activity. 

Seek advice from your doctor or pharmacist before using Plan B Emergency Contraceptive if you have any known allergies, as this medication may contain inactive components that could potentially cause allergic reactions or other complications. 

Seek advice from your doctor or pharmacist if you have any health issues before taking Plan B Emergency Contraceptive. 

Consult with a healthcare professional before using Plan B Emergency Contraceptive if you are on medication for seizures, tuberculosis, or HIV AIDS. Certain medications may reduce the effectiveness of levonorgestrel as an emergency contraceptive. 

The safety and effectiveness of Plan B Emergency Contraceptive for long-term contraception have been confirmed in women of reproductive age. These pills are anticipated to have the same level of safety and effectiveness for post-pubertal adolescents below 16 years old and for users aged 16 and above. 

Plan B Emergency Contraceptive is not intended for postmenopausal women. 

The use of Plan B Emergency Contraceptive is contraindicated in cases of an existing pregnancy, as it is ineffective in terminating an already established pregnancy (when the fertilized egg has implanted in the uterus). 

Inform your doctor if you are breastfeeding, as Levonorgestrel may have an impact on breast milk production. 

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Quality Prescription Drugs has provided information from third parties intended to increase awareness and does not contain all the information about Plan B Emergency Contraceptive (Levonorgestrel). Talk to your doctor or a qualified medical practitioner for medical attention, advice, or if you have any concerns about Plan B Emergency Contraceptive (Levonorgestrel).