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Are There Any Negative Interactions Between Dayquil, Allegra And Alka Seltzer Cold?

Posted on Mon, 6 Apr 2015

Question: My fiance has taken multiple over the counter medicines for allergies and cold. I do not know if there are any dangers in doing this. This was all taken within 3 hours. ( Alkeseltzer Cold - Generic Sinus Capsule - Dayquil Liquid - Allegra - Flonaise Nasal Spray ). He says that he is drowsy when he drives and I would like to know if there are any dangers of him taking all these within 3 hours. Thanks

Answered by Dr. Michelle Gibson James (2 hours later)

Brief Answer:
excess drowsiness

Detailed Answer:
HI, thanks for using healthcare magic

There are different formulations of the XXXXXXX seltzer and dayquil so the ingredients may vary slightly according to the formulation.
XXXXXXX seltzer may contain dextromethorphan (cough suppressant), acetaminophen, chlorpheniramine (Antihistamine) and phenyephrine (decongestant)

Dayquil may contain dextromethorphan, phenyephrine and also acetaminophen

Allegra is an antihistamine though non drowsy.

The anti histamine in the XXXXXXX seltzer, the dextromethorphan in both the XXXXXXX and the dayquil can all cause drowsiness so it is likely that he may feel drowsy with this combination.

It would be best, if possible to sleep this off.

When medication is needed again either the XXXXXXX seltzer or the day quil can be used, not both

I hope this helps, feel free to ask any other questions

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar

Follow up: Dr. Michelle Gibson James (18 minutes later)

Thanks for your answer on this problem. I still would like to know if this combination is dangerous if he keeps using all of these together and is there any future complications with maybe his liver or something.
Thanks

Answered by Dr. Michelle Gibson James (21 minutes later)

Brief Answer:
only organ affect would mainly be brain with drowsiness and dizziness

Detailed Answer:
Hi

No would not have future effects on his liver or other organs but they should not be used together because of the excessive drowsiness which can seriously impair function
May also cause dizziness in some persons.

These effects would not be permanent

Please feel free to ask any other questions

Note: For further information on diet changes to reduce allergy symptoms or to boost your immunity, Ask here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar