That means it makes you urinate more, which can lead to dehydration.
And dehydration can make blood pressure harder to predict. Heart& Hypertension
It can also concentrate medication in your bloodstream.
So you can end up with this weird swing.
Too low in one moment.
Unstable in another.
All from something that seems harmless with dinner.
I came across a patient example that explains this well.
A man named Gerald was 68 years old and taking lisinopril for well-controlled blood pressure. He had been stable on the same dose for over a year.
Then he started getting dizzy in the evenings. Sometimes close to fainting.
When his care team looked at his routine, they found he had started drinking two glasses of wine with dinner most nights.
The lisinopril was relaxing his blood vessels.
The alcohol was doing the same thing.
And after meals, blood pressure naturally dips a little anyway.
So the combination was too much.
Once he cut back to an occasional drink and made sure he stayed hydrated on those nights, the episodes stopped.
His medication dose never changed. Drugs& Medications
That’s the dial again.
Nobody touched the prescription.
But something else turned the dial.
Now, this next one is where I really want you to pay attention.
Because this is the one most people would never think about.
Licorice.
And I don’t mean the red candy at the movie theater.
I mean real black licorice.
And even more importantly, licorice root in herbal teas, supplements, and certain imported candies.
The active compound is called glycyrrhizin.
And this one is not mild.
Here’s what happens.
Glycyrrhizin blocks an enzyme in your kidneys called 11-beta-HSD2.
That enzyme helps regulate the hormone system that controls sodium and potassium balance.
When it gets blocked, your body can start acting like aldosterone levels are extremely high.
That means you retain sodium.
You lose potassium.
And your blood pressure can climb.
Researchers call this pseudohyperaldosteronism.
Big word.
But the practical meaning is simple.
Your body starts doing the opposite of what your blood pressure medication is trying to do.
And that’s the part that catches people off guard.
Because it’s natural.So if you’re taking amlodipine and you’ve noticed swelling in your ankles or lower legs, sodium may be making that side effect worse.
And if you’re taking lisinopril or losartan, high sodium can push back against the very thing the medication is trying to do.
Those medications help reduce the hormonal signals that tighten blood vessels.
But a high-sodium diet keeps pushing pressure upward.
So in a way, your medication is pressing the brake…
while sodium is quietly pressing the gas.
The American Heart Association recommends staying under 1,500 milligrams of sodium per day for optimal blood pressure control.
The average American gets more than double that.
And most of it is not from sprinkling salt on food.
It’s already built into the food before you even open the package.
So if you feel like you’re taking your medication correctly, but your numbers still aren’t where they should be, checking sodium is one of the most useful places to start.
Before we move on, I want to ask you something.
If you’ve been on one of these medications for a while, did your doctor or pharmacist ever specifically talk to you about food interactions?
Leave a comment below.
I’m genuinely curious how often this conversation actually happens.
So sodium quietly pushes against the medication.
But the next one is different.
It can pull your blood pressure in two directions at once.
Alcohol.
Amlodipine and lisinopril both relax blood vessels to help bring blood pressure down.
Alcohol also relaxes blood vessels.
So when you combine them, the blood pressure-lowering effect can stack.
That can lead to dizziness, lightheadedness, or a sudden drop in blood pressure when you stand up.
That’s called orthostatic hypotension.
And for older adults, that matters. Because dizziness plus standing up too fast can turn into a fall.
And falls are serious.
But alcohol has another side too.
It’s a diuretic.
