It's been along time since i used OTC meds for my kiddos but i have some tried and true less conventional things taht might help, they work for my kids anyways. first about the honey yes it ahs to be pure and most stores have an organic section now and you can most likely find it there, not sure what the dosage would be for your son but i'm sure google could tell you. my middle son has a nebulizer, he's not bad unless he is sick though so we don't use it often but i know a little of what you go through there, soemthing that works great for him when he has a cough is vicks, even the johnson's kind on his feet and then putting socks on, it immediantly takes care of his cough, as in he misse school today for a cough and feer while he was with his father, and is now sleeping soundly with no cough at all and all i did was give him a warm bath and rubbed up his feet good, it makes for some slimey socks though. something else that helps more with congestion is lemon juice in a vaporizer, works just like all the medicine additives you buy at the store but it's natural. and since you mentioned it in your post i want to say kuddos to you for being informed, it's your choice how to raise your child and even "chrunchy" parents can be ignorant jerks, just because something is natural does not mean it is safe, and an informed decision that is best for your family is generally the best one you can make, hopefully you find something that works to help your son feel better and be the happy little boy i'm sure he is.