Plan B Dangers

Although most women tolerate Plan B One-Step™ (levonorgestrel) well, it is not free of risks. Because this medication is not suitable for everyone, make sure you talk to your healthcare provider about possible dangers with Plan B that may apply to you.
For instance, make sure your healthcare provider is aware of any other medical conditions you may have and any other medications you are taking (including nonprescription medications, vitamins, and herbal supplements) before starting treatment with Plan B. Dangers of this medication include potential side effects. Some of the most common side effects include:
Other warnings apply to women who are pregnant or breastfeeding, as well as people who have certain allergies (including allergies to foods, dyes, or preservatives). Also, you may not be able to take Plan B if you have certain medical conditions, such as diabetes.
(Click Plan B Side Effects and Plan B Warnings and Precautions for more information on potential dangers to be aware of before starting treatment with this contraceptive. These articles also explain what to tell your healthcare provider before using Plan B and who may not be able to safely use the medication.)
Last reviewed by: Kristi Monson, PharmD
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