Some cases of sedation and hyperexcitability and weak suction have been described. It have been reported, though, one case of two months lasting irritability and insomnia in an infant born to a mother who had taken the drug during pregnancy but did not breastfeed the child. If a pregnant woman has not been switched to other anti-convulsivant drug it would be a better option for the mother to keep-on suckling her child and follow-up the infant closely.