Epilepsy Home > Trileptal Side Effects

While most people tolerate Trileptal well, it's possible that side effects will occur during treatment with the drug. A few common side effects of Trileptal include headaches, fatigue, and nausea. Other side effects, while less common, are more serious and should be reported to a healthcare provider immediately. Among these more serious side effects are worsening of seizures, signs of an allergic reaction, and hallucinations.

An Introduction to Trileptal Side Effects

As with any medicine, side effects are possible with Trileptal® (oxcarbazepine); however, not everyone who takes the medication will have problems. In fact, most people tolerate Trileptal quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with this drug. Your healthcare provider can discuss a more complete list of Trileptal side effects with you.)

Common Side Effects of Trileptal

Trileptal has been studied thoroughly in clinical trials. In these studies, the side effects that occur in a group of people taking the drug are documented and are then compared to side effects that occur in another group of people not taking the medicine. This way, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
In these studies, the most common side effects of Trileptal included:
  • Headaches -- in up to 31 percent of people
  • Dizziness -- up to 28 percent
  • Nausea -- up to 22 percent
  • Fatigue -- up to 21 percent
  • Drowsiness -- up to 19 percent
  • Vomiting -- up to 15 percent
  • Vision problems -- up to 14 percent.
Some other common side effects (occurring in 5 percent to 7 percent of people) included:
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Last reviewed by: Kristi Monson, PharmD;
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