DayQuil is generally taken every 4 hours as needed, but it is important not to exceed 4 doses within a 24-hour period to avoid potential health risks, such as liver damage. The typical adult dose for DayQuil liquid or LiquiCaps is 30 mL or 2 capsules every 4 hours, up to 4 times a day. For children aged 6 to 11 years, the dose is typically 15 mL every 4 hours, up to 4 doses in 24 hours. DayQuil is not recommended for children under 4 years old unless directed by a physician. Always follow the instructions on the packaging or consult a healthcare professional for personalized advice.