Even though difficult child switched to adult strength OTCs a few years ago, I'm real curious about learning the specific risks and reactions they are worried about. difficult child's pediatrician (1 1/2-2 years ago) had started steering away from rx'ing steroids except in the more serious situations and had already started rx'ing an allergy medication that had a different chemical make-up than most and said it was because they had started noticing a correlation between the traditionallky rx'd medications and kids' impulsivity, hyperactivity, agitation, and stimulation and resulting behavior issues. When difficult child had bad allergies that would lead to ashmatic wheezing as a baby and preschooler, they still would not rx him an anti-histimine until he was 6yo or older.
On a different angle though, the pediatrician rn use to recommend infant dimettap for difficult child when he had congestion as a baby. I gave it to him on three different occasions and it did work well for clearing the congestion and helping him rest, however all three times he had ashmatic wheezing and was on the nebulizer the next day. Despite the nurse's insistance that this medication could not cause that, I refused to give it to him anymore. That medication is no longer on the market for babies and was recalled for kids because the FDA pulled their approval of it after several years of many children having adverse reactions to it.