Thank you for your query,
As nurophen contains analgesic
NSAID drug ibuprofen
. As your child have taken adult doses and you dont know the number of tablets. you better consult Emergency or Pediatrician
as soon as possible.
Because ovedosage will produce drowsiness
the sleepiness may be related.
Earlier you reporting is important because activated charcoal admimistration is useful before absorption of drug from gut.And supportive treatment can be started early.
Hope i have answered your query,
Wish your child good health.