DayQuil is a cold and flu medication that contains several active ingredients, such as acetaminophen, dextromethorphan, and phenylephrine. To avoid potentially harmful interactions, you should not mix DayQuil with the following substances:
Alcohol: Mixing alcohol with DayQuil can increase the risk of liver damage due to acetaminophen and intensify drowsiness or dizziness caused by dextromethorphan.
MAO inhibitors: These medications, such as isocarboxazid, phenelzine, and tranylcypromine, are used to treat depression. Combining them with DayQuil can lead to a dangerous increase in blood pressure or other serious side effects.
Sedatives and tranquilizers: Mixing DayQuil with medications like benzodiazepines, sleeping pills, or muscle relaxants can increase drowsiness and impair cognitive function.
Other cold, cough, or allergy medications: Using multiple medications with similar ingredients may increase the risk of overdose or side effects.
Caffeine and stimulants: The combination of phenylephrine in DayQuil with caffeine or stimulant medications can lead to increased heart rate, blood pressure, and the potential for heart-related complications.
Blood pressure medications: DayQuil's phenylephrine component can interfere with the effectiveness of certain blood pressure medications.
Always consult your healthcare professional before taking DayQuil alongside any other medications or substances. Inform them of your complete medical history and all medications you are currently taking to ensure safe and effective treatment.