Skip to main content

Drug Interactions between DayQuil/NyQuil Severe Cold and Flu and fluoxetine

This report displays the potential drug interactions for the following 2 drugs:

Edit list (add/remove drugs)

Interactions between your drugs

Major

dextromethorphan FLUoxetine

Applies to: DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine) and fluoxetine

Using dextromethorphan together with FLUoxetine may increase the effects of dextromethorphan. Contact your doctor if you experience difficulty breathing, dizziness, drowsiness, anxiety, restless feeling, nervousness, confusion, or diarrhea. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data

Moderate

dextromethorphan doxylamine

Applies to: DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine) and DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine)

Using dextromethorphan together with doxylamine may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit the use of alcohol while being treated with these medications. Also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data

Moderate

FLUoxetine doxylamine

Applies to: fluoxetine and DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine)

Using FLUoxetine together with doxylamine may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit the use of alcohol while being treated with these medications. Also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data

Drug and food interactions

Major

acetaminophen food

Applies to: DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine)

Ask your doctor before using acetaminophen together with ethanol (alcohol). This can cause serious side effects that affect your liver. Call your doctor immediately if you experience a fever, chills, joint pain or swelling, excessive tiredness or weakness, unusual bleeding or bruising, skin rash or itching, loss of appetite, nausea, vomiting, or yellowing of the skin or the whites of your eyes. If your doctor does prescribe these medications together, you may need a dose adjustment or special tests to safely take both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data

Moderate

dextromethorphan food

Applies to: DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine)

Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan. Do not use more than the recommended dose of dextromethorphan, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.

Switch to professional interaction data

Moderate

FLUoxetine food

Applies to: fluoxetine

Alcohol can increase the nervous system side effects of FLUoxetine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with FLUoxetine. Do not use more than the recommended dose of FLUoxetine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.

Switch to professional interaction data

Moderate

doxylamine food

Applies to: DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine)

Alcohol can increase the nervous system side effects of doxylamine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with doxylamine. Do not use more than the recommended dose of doxylamine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.

Switch to professional interaction data

Moderate

phenylephrine food

Applies to: DayQuil / NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine)

Both phenylephrine and caffeine can increase blood pressure and heart rate, and combining them may enhance these effects. Talk to your doctor before using these medications, especially if you have a history of high blood pressure or heart disease. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.


Report options

Loading...
QR code containing a link to this page

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.