Everyday medications that can raise your blood pressure

Feel a headache coming on? Stuffy nose? Heartburn? Your first thought may be to reach for a drug store pain reliever, decongestant or antacid. But if you have high blood pressure or take blood pressure medicine, those pills could put you at risk. These and other over-the-counter (OTC) products can spike blood pressure or get in the way of how your medicine works.

“People often have the perception that over-the-counter medications are completely safe and without side effects, but that’s not always the case.” So says Dave L. Dixon, PharmD, who is on the faculty at Virginia Commonwealth University School of Pharmacy. He is also on the Prevention of Cardiovascular Disease Leadership Council at the American College of Cardiology.

It’s true that the U.S. Food and Drug Administration reviews OTC medicines. They look at if a drug is safe to take without a prescription. “But that doesn’t mean there’s no chance of side effects or that they won’t interact with something else you’re taking,” Dixon explains.

A normal blood pressure is less than 120/80 mm Hg. For people with normal blood pressure, using OTC drugs for short periods usually isn’t a concern. That’s according to David A. Alter, MD, an associate professor of medicine at the University of Toronto. But if regular testing shows your blood pressure continues to be high, you need to watch out for possible side effects and interactions. You also need to be careful if you’re already on a blood pressure treatment. Here’s what you should know to keep safe.

Why blood pressure matters

Your blood pressure is the amount of force needed to move blood through the vessels in your body. The higher the pressure, the harder your heart has to work. And the harder your heart works, the more friction that’s created. Over time, that friction can damage the lining of your blood vessels.

Seriously high blood pressure (think 180/120) can cause symptoms like a headache or nosebleed. But in most cases, there are no signs of high blood pressure. “It’s known as the silent killer,” Dixon says. “When it’s uncontrolled over time, it’s the leading cause of heart disease.”

In fact, the condition increases your risk of stroke, heart failure, kidney disease, eye problems and more, adds Dr. Alter. He’s a senior scientist and chair of cardiovascular and metabolic research at University Health Network (UHN) Toronto Rehabilitation Institute.

“High blood pressure is a complicated disorder,” Dr. Alter says. “Your kidneys, adrenal glands, brain and heart can all play a role.” Because of that, the average number of medications needed to control it is between three and four, he says. And if you stop taking any abruptly or do not take them consistently, your blood pressure may shoot up. It can be sudden or take a few days or weeks, and you might not know until it’s too late.

“I’ve seen horrific complications when people stop taking their medications,” Dr. Alter says. “But if you do forget, don’t panic. Take it as prescribed the next day rather than doubling up.”

How OTC remedies affect blood pressure

There are several things that can go wrong with different products. For example, some OTC medications change fluid levels in the body, which changes the amount of pressure required to move your blood. Other products cause problems with how your system absorbs or metabolizes prescription medications, Dr. Alter says.

“If there’s any advice I give, it’s to keep a detailed list of everything you take, regardless of where you get it, and share that list with your doctor,” Dixon says.

In the meantime, here are some over-the-counter medications and supplements that may impact blood pressure. In some cases, you might get the okay from your doctor to take one or more for a brief period. In other cases, your doc might warn you against them and offer an alternative.

1. Non-steroidal anti-inflammatories (NSAIDs), such as ibuprofen and naproxen. NSAIDs may cause you to retain water, which means your heart has to work harder to pump the increased volume. They can also stop your vessels from expanding properly. When the vessels are narrow, blood can’t flow as easily.
   
   Alternative: “Topical diclofenac is an NSAID that’s generally not going to affect BP,” says Dixon. Acetaminophen, a common pain reliever, is also recommended.
    
2. Nasal decongestants and cold and flu medicines. Many of these contain NSAIDs to ease the aches that come with a cold, flu or sinus pain. They also often contain ingredients that dry up mucus and constrict (squeeze) blood vessels, which can raise blood pressure, Dr. Alter says.
   
   Alternative: Saline sprays loosen mucus to soothe stuffiness. “Hot tea and warm showers or a warm compress can also give you relief,” Dixon says. For seasonal allergies, he recommends short-term use of a nasal corticosteroid (steroid) spray.
    
3. Antacids. “They tend to be high in sodium, which causes you to retain water,” Dixon says. “The resulting extra fluid can push blood pressure up.”
   
   Alternative: Changing your diet may help ease symptoms of reflux. Fried foods, pizza and fatty meats such as bacon all can contribute to heartburn. Better options are oatmeal, bananas and water-rich produce like cucumbers and watermelon, which help reduce stomach acid and heartburn. You can also talk to your doctor about drugs known as proton-pump inhibitors (PPI) or H2-blockers, Dixon says.
    
4. Herbal, weight-loss and other supplements. They can contain caffeine or other stimulants, which can raise blood pressure to dangerous levels, Dixon says.
   
   Alternative: Talk to your care team for a holistic (and more effective) plan to lose weight or address issues you’d turn to supplements for.

Besides OTC products, it’s also important to be careful with alcohol, recreational drugs, energy drinks, coffee and other sources of caffeine. These all can raise blood pressure, Dr. Alter says. Not getting enough sleep is another simple thing that raises blood pressure. On the other hand, things that can help control blood pressure include eating foods that are high in fiber and low in sodium and getting regular exercise.

Need help or have a question about medications or a health issue? Want to work toward getting off blood pressure medications? Lean on your care team to devise a safe plan. Says Dr. Alter: “The body is dynamic — it can change.”

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