The typical recommended dose of DayQuil for adults and children 12 years and older is 2 capsules or 30 mL of liquid every 4 hours as needed. Do not take more than 4 doses (8 capsules or 120 mL) in 24 hours. For children ages 6 to 11, the dose is usually 15 mL every 4 hours as needed, but no more than 4 doses (60 mL) in 24 hours. DayQuil should not be given to children under 4 years old without consulting a doctor. Always follow the specific product label instructions and do not exceed the maximum daily dose to avoid serious side effects such as liver damage.