ibuprofene 400 posologie how much motrin for 3 year old About Essence-In-Use › Forums › Essence-In-Use › ibuprofene 400 posologie how much motrin for 3 year old This topic has 0 replies, 1 voice, and was last updated 2 years, 3 months ago by SofiaDameron. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In