Is it dangerous if a child aspirates children's tylenol?

Our 18 mo old had a slight fever and was out of sorts last night so we used a syringe to give her 4ml of children's Tylenol. She was crying and struggling as I squirted it in, and she ended up inhaling almost all of it. Her eyes got big and red, coughed violently, and was pretty unhappy for a while but ultimately after a lot of comforting and back patting she seemed OK. She slept well, but this morning she has a rattling cough and I'm wondering if the inhaled Tylenol has anything to do with that? She's very clingy and seems like she might be coming down with a cold, which isn't that unusual (daycare!) but I want to make sure that inhaled grape Tylenol isn't something we should do something about? :( Thanks for any help!