One side effect of taking lamotrigine (Lamictal) is a rash, which may turn serious. Learn how to recognize it, treat it, and when to get emergency help. Lamictal rash is a side effect of the prescription medication. This guide discusses symptoms of the rash, as well as information about treatment and diagnosis. Key Takeaways If you get a rash while taking Lamictal, you should see your doctor right away. Lamictal can cause serious reactions like Stevens-Johnson syndrome or toxic epidermal necrolysis. To avoid a serious Lamictal rash, start on a low dose and increase it slowly. Lamictal can cause a rash that may be a sign of a serious allergic reaction. The rash can appear as small, itchy, pink bumps on the skin. If you notice a rash while taking Lamictal, seek medical help immediately, even if the symptoms are mild. Most Lamictal rashes are harmless, but some signal a serious reaction. Learn how to tell the difference and when to call your doctor. Learn how to spot a mild lamotrigine rash versus a serious reaction, and know when to call your doctor right away. In this article, we cover the frequency of Lamictal rash, symptoms, treatment, and possible complications. Lamotrigine can cause a rash, which may range from mild to serious. Learn how to identify symptoms, reduce risks, and when to seek medical help. Identify the characteristics, timeline, and associated symptoms of a potential Lamictal-induced rash. This guide compares mild reactions with severe, life-threatening conditions like SJS and outlines the critical steps to take when a rash appears. Contact your healthcare provider or other emergency medical services right away if you develop a rash or other signs of a drug allergy (such as a fever or swelling of your lymph nodes) while taking lamotrigine.