URGENT

Mariah • Mommy to 3 beautiful babies 💙💗💙& 1 fur baby 🐱

I have a 2 year old who got the ibuprofen (infants) bottle open and drank about 1/4 of it, he only had 1 5ml dose in the last 24 hours should I bring him to the ER? Or what should I watch for?