AURORA, Colo. (KDVR) — Amid scorching temperatures across the American West, doctors are cautioning anyone taking certain medications to take extra steps to keep cool.
When temperatures reach into the 90s, more people seek medical attention for heat-related illnesses, said Dr. Vik Bebarta, an emergency medicine physician and toxicologist at UCHealth University of Colorado Hospital.
“We have seen a lot of patients come in with heat-related illness … outside working in the field or working on outside projects, or elderly patients who just can’t tolerate the heat as much,” he said.
Some patients are people on certain medications that don’t allow their bodies to keep cool during hot days.
“They’re medications for blood pressure like we call diuretics. They’re medications for sometimes allergies, like antihistamines, and other anti-depressants,” Bebarta said.
He said some cause dehydration, some can raise a person’s internal body temperature, and some prevent sweating, which is the body’s natural cooling system.
“They should try and limit their time outside. They should try and make sure they’re staying cool. The moment they develop symptoms, they should get inside, drink liquid, stay hydrated,” said Bebarta.
While most of the medications that affect the body’s ability to respond to heat are prescribed by a doctor, others are common over-the-counter remedies.
“Actually, the medications like Benadryl and like Zyrtec — moreso Benadryl — can [inhibit your ability] to respond to heat. And even cold medications — the mixed medications together, the Vick’s formula, those types of things — have antihistamines in them, and that decreases your ability to respond to heat,” Bebarta said.
The effect of the medications on the body’s ability to deal with the heat is minimal and not usually problematic or noticeable. However, in conjunction with conditions such as altitude, dehydration and excessive heat, Bebarta said, medication can cause a person to tip past the point of simply being hot.
“The combination of those effects need to come together at the same time for them to get sick enough to need to seek care,” he said.
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However, the symptoms can be dangerous.
“They can come in with confusion, sometimes if they’re really sick, or often they are sort of weak and tired and hot and sweating and dizzy,” Bebarta said. “You can collapse and pass out. If you pass out for a long time, you can have some brain injury, and your blood pressure can get quite low.”
Older people are more at risk of heat-related illness because the body loses its natural ability to keep itself cool as it ages. However, hot weather can also affect young and healthy people if they participate in strenuous physical activities in high temperatures, according to the Centers for Disease Control and Prevention.
“Summertime activity, whether on the playing field or the construction site, must be balanced with actions that help the body cool itself to prevent heat-related illness,” the CDC says.