
What Should I Do For Persistent Cough Despite Taking Mucinex DM?



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Detailed Answer:
Hello and welcome,
Mucinex DM has guaifenesin and dextromethorphan.
The dextromethorphan is a cough suppressant but doesn't always work.
The guaifenesin is a mucolytic meaning it breaks mucus up, allowing it to pass more easily.
It sounds like it didn't help much. It's best to drink a lot of water to help the guaifenesin do it's job. So She can try another dose and increase her water consumption.
If the coughing is from drainage going down from her sinuses, she can try saline nasal rinses (either with a nettipot or ready made sprays like Simply Saline in a pump canister). She can also try a steroid nasal spray to help decrease the drainage. You can buy this over the counter and it is safe for someone with atrial fibrillation. But don't use it within an hour of the saline rinses as it will just drip down into her stomach.
If she is running a high fever, smokes, or has asthma or diabetes, she may need to go in to be seen to make sure the cough isn't from something worse than a cold.
I hope this information helps. Please let me know if I can provide further information or clarification.

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