he can probably handle a 1/2 tsp (2. 5 ml) without any problems assuming he doesn't get wired. benadryl makes adults sleepy but children can have a paradoxical effect where they actually become hyper. since i do not know anything about your child's medical history or the reason you are using benadryl it would be good to run this dosage adjustment by his pediatrician first. if you are treating a drippy nose or allergies there are other antihistamine choices that may be better now that he is two years old.
what dosage of benadryl for a 30 pound/ 2 year old toddler? . at 8 months-old my son was prescribed q-dryl 1 ml every 6 hours. now he is 2 years 2 months and 30 lbs 4 ozs how many 'ml' or 'tsp' do i give him now? thanks for your time!