laboratory diagnostic - drugs - Lamotrigine, Lamictal, serum. Centrifuge the sample and settle the serum without delay. Do not use tubes with phase separators. Always sample at the same time before another administration. All requests must ALWAYS contain: sampling date and time; the date and time of the last dose; the reasons for the prescription (efficiency and/or toxicity test); the treatment start date and/or the date of any change of dosage; the subject's age, height and weight, when possible; the dosage data (quantity administered, frequency, administration route), The serum must be frozen within 4 hour after collection and must be sent in the frozen samples container(!), LC-MS, todylaboratories®, code L76LD1431