When giving your kid Benadryl, did y’all go by age or weight?? I’ve always been told to go by age & I know most Benadryls say if under age of 2, not to use & if age 2-5 to consult a doctor before using & it’s for ages 6-11. But I’ve also heard a lot of people go by weight. My bubs almost 18 months & 28lbs. I wouldn’t give him medication without asking his doctor but I was just wondering what y’all do?