M.N.
As one other mom suggested - try Ocean Nasal Spray - you can remember the name.. but it has no cranberries in it. Walgreens, CVS, Kroger, etc. all have it in a white and orange bottle. The spray is a nasal moisterizer, which allows the back of the throat to not feel dry(which would send a signal to the brain to cough to clear the dryness). It is non-narcotic, not habit-forming and you can put drops on a q-tip to drop into her nose to 'tickle' the nostrils. I was told about it when my kids were little and it works great. Cough/clearing throat are vaild signs for allergies, so let me know if you want a souding board for that issue if it comes up.