DayQuil Dosing Recommendations
For patients 6 years and older, DayQuil should be dosed as follows: children 6 to under 12 years take 5 mL every 12 hours (maximum 10 mL/24 hours), and patients 12 years and older take 10 mL every 12 hours (maximum 20 mL/24 hours). 1
Age-Specific Dosing Algorithm
Children 4 to Under 6 Years
- Dose: 2.5 mL every 12 hours
- Maximum daily dose: 5 mL in 24 hours
- Shake bottle well before each use
- Use only the provided dosing cup 1
Children 6 to Under 12 Years
- Dose: 5 mL every 12 hours
- Maximum daily dose: 10 mL in 24 hours 1
Adolescents and Adults (12 Years and Older)
- Dose: 10 mL every 12 hours
- Maximum daily dose: 20 mL in 24 hours 1
Children Under 4 Years
- Do not use 1
Critical Safety Considerations
Acetaminophen component: The maximum daily acetaminophen dose across all sources must not exceed 4 grams in adults. Patients using multiple acetaminophen-containing products simultaneously are at significantly higher risk of exceeding this limit 2. Always verify that patients are not taking additional acetaminophen from other cold medications, pain relievers, or prescription drugs.
Timing interval: The 12-hour dosing interval must be strictly maintained. Do not allow patients to redose early, as this increases risk of acetaminophen toxicity 2.
Important Caveats
- Measure only with the provided dosing cup - do not use household spoons or cups from other products 1
- Shake the bottle well before each dose to ensure proper drug distribution 1
- For patients with conditions that may increase acetaminophen susceptibility (chronic alcohol use, prolonged fasting, concurrent isoniazid), exercise additional caution with dosing 3
- DayQuil has demonstrated comparable efficacy to other combination cold products with potentially fewer adverse effects and better quality of life scores 4