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Mifeprex Side Effects

Your healthcare provider needs to know right away if you develop problems like heavy vaginal bleeding or a persistent fever after taking Mifeprex. Fortunately, most side effects of this drug are generally minor and treated easily. Clinical trials have shown that abdominal (stomach) pain, vaginal bleeding, and uterine cramping are the most commonly reported reactions to this prescription medication.

An Introduction to Mifeprex Side Effects

Just like any medicine, Mifeprex® (mifepristone) can cause side effects. In fact, most people who take the medication will experience some type of side effect. However, in most cases, the side effects are minor and either require no treatment or are treated easily by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with Mifeprex. Your healthcare provider can discuss a more complete list with you.)

Common Side Effects of Mifeprex

Mifeprex has been studied extensively in clinical trials. In these studies, the side effects that occurred in a group of women taking Mifeprex were carefully documented, so it was possible to see what side effects were reported and how often they occurred.
In these studies, the most common side effects of Mifeprex included the following:
  • Abdominal (stomach) pain -- in up to 96 percent of women
  • Vaginal bleeding -- up to 90 percent
  • Uterine cramping -- up to 83 percent
  • Nausea -- up to 61 percent
  • Headache -- up to 31 percent
  • Vomiting -- up to 26 percent
  • Diarrhea -- up to 20 percent
  • Dizziness -- up to 12 percent
  • Fatigue -- up to 10 percent
  • Back pain -- up to 9 percent.
Other side effects, reported in 1 percent to 5 percent of women, included:
  • Severe vaginal bleeding
  • Fever
  • Infections
  • Vaginal and pelvic inflammation
  • Chills and shaking
  • Heartburn and indigestion
  • Insomnia
  • Weakness or lack of energy
  • Leg pain
  • Anxiety
  • Anemia (low levels of red blood cells)
  • Vaginal discharge
  • Sinus congestion
  • Pelvic pain
  • Fainting
  • Dizziness.
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Mifeprex Medication Information

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