I gave my son 5.9ml of the Zarbee’s nighttime cough and mucus medicine as suggested for 2 year olds. He’s 20 months and the size of a 2 1/2 year old. He has a bad cough and runny nose. I put honey in his peanut butter sandwiches so I just want to make sure he will be alright? Definitely going to keep an eye on him though.