What Are the Dosage Instructions for Mucinex Fast Max?

By Staff WriterLast Updated Mar 26, 2020 11:17:16 AM ET

The dosage of Mucinex Fast-Max for adults and children over age 12 is 20 milliliters of liquid or two caplets every four hours, according to the Mucinex website. Children under the age of 12 should not take this medication.