Can I Take NyQuil and DayQuil With Perindopril Erbumine?

Hello there! NyQuil and DayQuil alongside perindopril is something I'm happy to review with you.

Stopping to check before you head for the cold aisle is exactly what I'd hope for from someone on an ACE inhibitor. Most of what is in NyQuil and DayQuil pairs well with perindopril erbumine, with one exception, the decongestant phenylephrine.

Before anything else I'd want to check the actual box/bottle, since Vicks sells several versions and the ingredients are not identical.

Phenylephrine in DayQuil and Your Blood Pressure

DayQuil Cold & Flu contains phenylephrine, an oral decongestant, and NyQuil Severe does too. Classic NyQuil (the green liquid or LiquiCaps) leaves out the decongestant, which makes it the easier of the two to pair with perindopril.

Perindopril erbumine is an ACE inhibitor that reduces blood pressure by relaxing blood vessels. Phenylephrine does the opposite, tightening blood vessels to shrink swollen nasal tissue, and that same tightening can raise blood pressure and work against your perindopril.

For most people whose pressure is well controlled, a day or two of phenylephrine causes a modest, temporary increase rather than a dangerous one. The product labels still advise anyone with high blood pressure or heart disease to ask a doctor or pharmacist before using it, and I'd take that seriously if your readings run high or you have heart trouble in addition to hypertension.

There is also a valid question about whether oral phenylephrine helps at all. An FDA advisory panel concluded in 2023 that the swallowed form does little to relieve congestion, and the FDA has since proposed removing it from over-the-counter products, so the DayQuil on today's shelf may differ from what it contained a few years ago.

Your pharmacist can tell you what is in the current box.

Acetaminophen, Dextromethorphan, and Doxylamine With Perindopril

Acetaminophen, the pain and fever reducer in both products, has no known interaction with perindopril. It is the pain reliever I prefer for people taking blood pressure medicine, since ibuprofen and naproxen can blunt an ACE inhibitor's effect and strain the kidneys when combined with it.

Perindopril is cleared through the kidneys, so protecting them matters more than it might seem.

The main caution with acetaminophen is adding up the total over a day. Each dose of DayQuil or NyQuil contains 650 mg, so count every dose of both, along with any Tylenol or other product with acetaminophen in it, and stay within the number of doses the label allows in 24 hours.

Dextromethorphan, the cough suppressant in both, also doesn't interact with perindopril. I'd only note that ACE inhibitors themselves cause a dry, tickly cough in some people, so if a cough lasts longer than the rest of your cold, mention it to your doctor rather than treating it with more cough syrup.

Doxylamine, the ingredient that makes NyQuil sedating, is an older antihistamine that can leave you dizzy or unsteady. Perindopril can cause lightheadedness on its own, especially when you stand up, so the two together can make a middle-of-the-night trip to the bathroom more risky. That is most important if you're over 65 or already prone to dizziness.

Lower-Risk Ways to Treat Your Cold Symptoms

If congestion is the primary complaint, a saline rinse or spray is safe to use as often as you like. An oxymetazoline nasal spray (Afrin) relieves stuffiness with much less medicine reaching the rest of your body than a swallowed decongestant, as long as you stop after three days to prevent rebound congestion.

For aches, fever, and cough, plain acetaminophen during the day along with classic NyQuil at bedtime covers most of what DayQuil would, without the phenylephrine. The Coricidin HBP line was created for people on blood pressure medicine and avoids decongestants entirely, though its chlorpheniramine can make you drowsy during the day.

Final Words

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