I know singulair has lactose in it so there may very well be lactose in the generic.
Your dry powder inhalers will have it as well (advair discus, ventolin discus etc)
If your daughter reacts to artificial sweetener that is one of the ingredients in the chewable tablets. Also you will find a common inactive ingredient in many drugs is lactose monohydrate. Yes call your pharmacist.
I hope this helps,
achilles2
I'm sorry your son is having such a hard time. It's got to be very frustrating for both of you when the medication he's been prescribed ends up causing MORE symptoms!
Off the top of my head, I don't know if his meds contain any dairy related ingredients, but there are a couple of ways you may be able to find out:
1) Take the package into the pharmacy and ask the pharmacist if they know
b) Contact the manufacturer of the medication (will be listed on the bottle/box) and ask them what the inactive ingredients/fillers, etc. are in the medication. Sometimes, these things are listed on the original packaging box, so if your pharmacy distributes the meds in their orginal box (rather than puttin gthem into a bottle), you might want to look at the box yourself and see if anything is lsted.
The other possibility here is that maybe he's having a side effect to the medication? Have you compared the symptoms that increase after he takes the meds to any listing of possible side effects of the med? There is a pretty good site that I use pretty often for information about my medications - it's www. drugs.com (of course, you would type that all together in the search engine, it's just that I can't type it all together here or it will come out jumbled) -- type in the medication name and it will give you all kinds of information about the med - side effects, uses, dosages, etc. I find it quite helpful.
Best of luck and I hope your little one feels better soon!