Lamictal is used to treat epilepsy and bipolar disorder. Find out what the recommended dosages are, how to take the drug, and more. This article describes the dosages of Lamictal, as well as its strengths and how to take it. To learn more about Lamictal, see this in-depth article. Lamotrigine may be taken with or without food or on a full or empty stomach. However, if your doctor tells you to take the medicine a certain way, take it exactly as directed. Detailed Lamotrigine dosage information for adults and children. Includes dosages for Bipolar Disorder, Epilepsy and Lennox-Gastaut Syndrome; plus renal, liver and dialysis adjustments. Detailed dosage guidelines and administration information for Lamictal (lamotrigine). Includes dose adjustments, warnings and precautions. The decrease in dose of 131 LAMICTAL should not exceed 25% of the total daily dose per week over a 2-week period, 132 unless clinical response or lamotrigine plasma levels indicate otherwise. osing Titration Adults: Weeks 1-2: 25 mg/day; Weeks 3-4: 50 mg/day; Week 5: 100 mg/day.Children under 16 (based on epilepsy guidelines): Weeks 1-2: 0.3 mg/kg/day; Weeks 3-4:0.6 mg/kg/day; Weeks 5 and onward: Increase the daily dose by 0.6 mg/kg every 1-2 weeks(always round down to the nearest whole tablet).On valproate: Reduce the lamotrigine. Medscape - Seizure, Lennox-Gastaut syndrome-specific dosing for Lamictal, Lamictal XR (lamotrigine), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy. Whether 100mg of lamotrigine is a significant dose depends on an individual’s condition and their doctor’s recommendation. For epilepsy, the usual adult dose ranges from 100mg to 700mg daily, while younger children have weight-dependent doses. Lamotrigine helps manage seizures and symptoms of bipolar 1 disorder. Here are typical lamotrigine dosages for adults, and what to do if you miss a dose.