As high as therapeutic levels of this drug have been found in the serum of infants (35-50% of maternal serum level). Side-effects were not observed, neither developmental nor IC derangements at long term follow-up among hundreds of children of treated mothers. A case was published of apnea in a newborn baby whose mother was on a very high dose of Lamotrigine (850 mg a-day). During pregnancy, it increases the clearance of Lamotrigine and other antiepileptic medication that warrants an increase in dosage in this period. After birth, the serum level rapidly increases with a risk of harm on both the mother and the infant, whenever dose is not reduced to that previous from pregnancy. An infant, 1 1/2 months old, whose mother was on Lamotrigine, resulted affected with Abstinence Syndrome soon after sudden weaning.