Hi, I finally got some Benadryl today but they had so many to choose from. I had to pretend it was for my partner because they don't want to hand it over readily and I can only get the pediatric stuff with a script from the doctor. I bought the Mucus relief plus decongestant which they said is good for blocked noses but it will also clear the chest and induce coughing. I don't want to give this to Rosie if she's going to be coughing up stuff. She's not chesty, she just has very wet snuffly sniffles, which I'm sure is URI but abs haven't really fixed the problem, so I want to try this. Will it be safe and will she be able to cough up if she needs to? Each 5ml of oral liquid contains Guaiphenesin 100mg, phenylephrine hydrochloride 5mg. I think this is way too strong because it works out to be 0.05ml for a 500gram rat...? That's calculating on the Guaiphenesin..... I also want to try it on Charlotte who is a serial sneezer.