I would NOT suggest Dimetapp. They’ve pulled all the lower dosage medications off the shelves. You can’t find Dimetapp or any other cold medication for infants anymore. The youngest it’s available now is 6 years old.
And I would not want to try and figure out how much of a 6 year old’s dose to give to an infant.
I would let the pediatrician lead the way.
Any med can be given to an infant with a Doctor’s supervision. If the Doc says “Do it” I’m sure she will.
What’s the longest you’ve ever gone without sleep? Grin