"If you do not want to get pregnant, there are many birth control options to choose from. No one product is best for everyone. The only sure way to avoid pregnancy and sexually transmitted infections (STIs or STDs) is not to have any sexual"...
The most common adverse events in the clinical trial for women receiving Plan B® (levonorgestrel) included nausea (23%), abdominal pain (18%), fatigue (17%), headache (17%), and menstrual changes. The table below shows those adverse events that occurred in ≥5% of Plan B® (levonorgestrel) users.
Adverse Events in ≥ to 5% of Women, by % Frequency
|Plan B® |
N = 977 (%)
|Heavier Menstrual Bleeding||13.8|
|Lighter Menstrual Bleeding||12.5|
Plan B® (levonorgestrel) demonstrated a superior safety profile over the Yuzpe regimen for the following adverse events:
- Nausea: Occurred in 23% of women taking Plan B® (levonorgestrel) (compared to 50% with Yuzpe)
- Vomiting: Occurred in 6% of women taking Plan B® (levonorgestrel) (compared to 19% with Yuzpe)
DRUG ABUSE AND DEPENDENCE
There is no information about dependence associated with the use of Plan B® (levonorgestrel) .
Read the Plan B (levonorgestrel) Side Effects Center for a complete guide to possible side effects
Theoretically, the effectiveness of low-dose progestin-only pills is reduced by hepatic enzyme-inducing drugs such as the anticonvulsants phenytoin, carbamazepine, and barbiturates, and the antituberculosis drug rifampin. No significant interaction has been found with broad-spectrum antibiotics. It is not known whether the efficacy of Plan B® (levonorgestrel) would be affected by these or any other medications.
Read the Plan B Drug Interactions Center for a complete guide to possible interactions
Last reviewed on RxList: 5/24/2007
This monograph has been modified to include the generic and brand name in many instances.
Additional Plan B Information
Plan B - User Reviews
Plan B User Reviews
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