You can learn more about medications’ side effects and storage requirements at the US National Library of Medicine’s MedlinePlus website.
You can also talk to your doctor or pharmacist, Phillips says. Ask about how much water you should be drinking if you’re on medications that increase dehydration.
He recommends staying hydrated and “not relying on your body’s ability to tell you that you’re thirsty”.
Some medicines – antibiotics, antifungals and acne drugs – can heighten sensitivity to the sun, causing rashes and sunburns.
How should medications be stored for travel?
Medication generally should be kept in a cool, dry place, unless it needs refrigeration. That can be challenging while travelling.
Before a summer road trip, check labels for the storage requirements of your medicines. Carry medicine in a cooler when travelling by car, even if it doesn’t require refrigeration. The car’s boot or glove box could get too hot for even room temperature storage.
What about prescriptions delivered by mail or courier?
A delivery can come at a bad time, says Ren, who recently helped his holidaying mother by bringing her delivery of supplements into her Houston home as the region faced soaring heat.
“If you know you’re going to be at work all day, or if you’re on vacation, and you get medications delivered, you definitely don’t want that sitting outside in the hot … sun,” Ren said.
Is more research needed?
Yes. Researchers in the US and Australia say some of the common warnings about heat and drugs don’t have a lot of scientific evidence behind them.
Ollie Jay at the University of Sydney found backing for only four of the 11 medication categories that the World Health Organization lists as concerns with high heat.
“We don’t have that answer yet, and it’s one that we need to rapidly figure out,” Salas says.