I am on Lamictal for epilepsy and have been for several years. Tonight, though, I am more congested than I have ever been in my life (that I remember). I can absolutely not breathe at all through my nose and feel like my head will explode whenever I swallow. I got up and took a hot steamy shower for about an hour or so and was finally able to breathe again through my nose. However, within minutes after, I again can not breathe at all through my nostrils and feel like my sinuses are swelling to the point of explosion. I am in a hotel, and they have Dayquil I could buy. However, I do not know if it will interact negatively with the Lamictal. Are you able to research to find out if it would?