I can't remember what the timing was. DD has a fever of 103 and it came down .2 degrees with tylenol in the last 45 mintues. I know I can give her motrin/ibuprofen but I can' remember how far apart the dosing should be. TIA! Also does anyone know at 18 months how often they should have a wet diaper. It has been four hours and she is refusing to drink more than a sip or two an hour.