Why Certain Medications Can Increase Your Risk in the Heat

As summer temperatures continue to climb across the U.S., millions of people who take daily medications face an often-overlooked danger — an increased risk of heat-related illness. Whether you’re managing high blood pressure, heart disease, or mental health conditions, some medications can alter how your body reacts to and regulates heat.

How Medications Affect Heat Tolerance

Your body naturally maintains a safe internal temperature — much like how a car engine needs to stay cool to run efficiently. It does this by sweating, redirecting blood flow toward the skin, and triggering thirst to encourage hydration.

However, certain medications can disrupt these mechanisms, making it harder to stay cool during heatwaves. For example:

• ACE inhibitors and ARBs, often used for heart conditions, can dull your sense of thirst.
• Beta blockers may reduce sweating and limit blood flow to the skin.
• Diuretics can increase the risk of dehydration.
• Anticholinergics (like Benadryl) can suppress sweat production.
• Antipsychotics and some antidepressants can interfere with temperature regulation.

When your body’s “cooling system” is compromised, overheating becomes much more likely — leading to dehydration, heat exhaustion, or even heat stroke.

Why the Risk Matters More Now

Research shows that patients on these medications are more likely to be hospitalized during periods of extreme heat. Older adults, in particular, face greater risks since age alone can make it harder to regulate body temperature.

And with climate change bringing longer, more intense summers, understanding these interactions is more important than ever. Doctors emphasize that you should never stop taking prescribed medication, but rather take steps to prevent overheating.

How to Protect Yourself During Heatwaves

If you’re taking medications that might affect your body’s response to heat, these precautions can make a big difference:

• Stay hydrated — drink water consistently, even before you feel thirsty.
• Keep your living space cool with fans, air conditioning, or shades.
• Avoid direct sunlight during the hottest hours (10 a.m. – 4 p.m.).
• Dress lightly and use cool, breathable fabrics.
• Know the warning signs of heat exhaustion: dizziness, rapid pulse, headache, or nausea.

Your healthcare provider can help you create a heat-safety plan that fits your medication needs.

Heat and certain medications can be a dangerous mix — but awareness and preparation can help you stay safe. As summers get hotter, remember that prevention is the best medicine when it comes to heat-related risks.

At Mediserv Pharmacy, we understand how medications can affect your health, especially during extreme heat. Our licensed pharmacists provide personalized medication consultations in the Bronx, helping you understand side effects, dosage timing, and interactions that may increase your risk in high temperatures. Visit us to speak with our experts and stay safe, informed, and healthy all summer long.