Can a Cold Raise Your Blood Pressure? What to Know

Yes, a cold can temporarily raise your blood pressure. This happens because your body's stress response, fever, and inflammation can increase heart rate and constrict blood vessels, and many over-the-counter cold medicines contain decongestants that directly raise blood pressure.

If you have high blood pressure, this temporary rise is usually not dangerous if your blood pressure is well-controlled, but it can be risky if your blood pressure is untreated or poorly controlled. Understanding why this happens and which cold remedies are safe can help you manage both your cold and your blood pressure.

How a Cold Affects Your Blood Pressure

When you catch a cold, your immune system releases chemicals that cause inflammation and fight the virus. This immune response can make your heart beat faster and your blood vessels constrict, which raises blood pressure. A fever, even a mild one, increases your metabolic rate and heart rate, further elevating blood pressure. The physical stress of coughing, congestion, and poor sleep can also contribute to a temporary rise.

According to GoodRx, illnesses like a cold can raise your blood pressure for many of the same reasons they increase your heart rate. This effect is usually temporary and resolves as you recover.

Cold Medicines That Can Raise Blood Pressure

Many over-the-counter cold and flu medications contain decongestants such as pseudoephedrine (Sudafed) and phenylephrine. These drugs work by narrowing blood vessels in your nasal passages to relieve stuffiness, but they also narrow blood vessels throughout your body, which raises blood pressure. The Mayo Clinic warns that some ingredients in cold medicines can raise blood pressure, and this can be dangerous for people with high blood pressure.

The American Heart Association notes that cold and flu medications can increase blood pressure, especially in people already struggling to control it. If you have high blood pressure, avoid decongestants or use them only under medical supervision.

Safer Alternatives for Cold Relief

If you have high blood pressure, consider these safer options:

• Saline nasal sprays or rinses to relieve congestion without medication.
• Antihistamines like loratadine or cetirizine, which are generally safe for blood pressure, though some may cause drowsiness.
• Pain relievers such as acetaminophen (Tylenol) for fever and aches; avoid nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen and naproxen, which can raise blood pressure.
• Cough suppressants like dextromethorphan are usually safe, but check labels for added decongestants.
• Humidifiers and steam to ease congestion naturally.

Always read labels carefully. The Brown Health article advises that some products have warning labels for people with high blood pressure, and if you're unsure, ask your pharmacist.

Cold Weather and Blood Pressure

It's not just the cold virus that can raise your blood pressure; cold weather itself can too. The Mayo Clinic explains that blood pressure generally is higher in the winter because low temperatures cause blood vessels to temporarily narrow. This means that during colder months, you may see higher readings even without a cold.

If you have a cold during winter, the combination of the illness and cold weather may lead to a more noticeable increase in blood pressure. Dressing warmly and staying indoors during extreme cold can help mitigate this effect.

When to Worry About High Blood Pressure with a Cold

For most people, a temporary rise in blood pressure during a cold is not a cause for alarm. However, you should contact your healthcare provider if:

• Your blood pressure is consistently above 180/120 mm Hg, which is a hypertensive crisis requiring immediate medical attention.
• You have symptoms like severe headache, chest pain, shortness of breath, or vision changes.
• You have heart disease, kidney disease, or diabetes, as even small increases can be risky.
• Your blood pressure remains elevated after your cold resolves.

If you monitor your blood pressure at home, take readings at the same time each day and avoid caffeine, smoking, and exercise 30 minutes before measuring. Report any concerning readings to your doctor.

Practical Tips for Managing a Cold with High Blood Pressure

Here are steps to help you recover from a cold while protecting your blood pressure:

• Choose cold medications wisely: Opt for single-ingredient products and avoid decongestants. Ask your pharmacist for help if needed.
• Stay hydrated: Drink plenty of fluids like water, herbal tea, and broth to thin mucus and support your body.
• Rest: Your body needs energy to fight the infection; lack of sleep can raise blood pressure.
• Use a humidifier: Adding moisture to the air can ease congestion and coughing.
• Monitor your blood pressure: If you have a home monitor, check your readings regularly and keep a log to share with your doctor.
• Avoid alcohol and tobacco: Both can raise blood pressure and worsen cold symptoms.

Remember, this information is general and not a substitute for personalized medical advice. If you have concerns about your blood pressure or cold symptoms, consult your healthcare provider.