Skip to content
My WebMD Sign In, Sign Up
Plan B

Side Effects

List Plan B side effects by likelihood and severity.

The following side effects are associated with Plan B:

Common side effects of Plan B:

  • Abnormally Long or Heavy PeriodsSevere
  • Absence of Menstrual PeriodsSevere
  • Bleeding Not Related to Menstrual PeriodSevere
  • High Blood SugarSevere
  • DiarrheaLess Severe
  • DizzyLess Severe
  • Enlargement of an OvaryLess Severe
  • Feel Like Throwing UpLess Severe
  • Head PainLess Severe
  • Infrequent MenstruationLess Severe
  • Low EnergyLess Severe
  • Mood ChangesLess Severe
  • NervousLess Severe
  • Ovarian CystLess Severe
  • Stomach CrampsLess Severe
  • Throwing UpLess Severe
  • Visible Water RetentionLess Severe
  • Weight GainLess Severe

Infrequent side effects of Plan B:

  • DepressionSevere
  • Discharge of Milk in Men or Women when Not BreastfeedingSevere
  • RashSevere
  • "Change of Life" SignsLess Severe
  • AcneLess Severe
  • Altered Interest in Having Sexual IntercourseLess Severe
  • Breast TendernessLess Severe
  • Chronic Trouble SleepingLess Severe
  • Excessive HairinessLess Severe
  • Hair LossLess Severe
  • Yellow-Brown Patches on SkinLess Severe

Rare side effects of Plan B:

  • Obstruction of a Blood Vessel by a Blood ClotSevere

Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, expect as may be authorized by the applicable terms of use.

CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

More about Drugs and Medications

URAC: Accredited Health Web Site HONcode Seal AdChoices