Heat and Your Medications: What You Need to Know
Summer in Louisiana is no joke. The heat index climbs, the humidity settles in, and most of us are focused on staying cool and getting outside. But there’s one thing many people overlook this time of year—how the summer heat is affecting the medications sitting in your medicine cabinet, your car, or your purse.
At Carmichael’s Pharmacy & Medical Equipment, we want to help you make sure your medications are stored properly all summer long.
Why Heat and Humidity Are a Problem
Most medications are designed to be stored at room temperature—typically between 59°F and 77°F. Once temps rise above that range, the chemical composition of certain drugs can begin to break down. That means reduced potency, altered effectiveness, or in some cases, medication that could cause unintended effects.
Humidity also speeds up that process. Moisture can cause pills to stick together, dissolve prematurely, or become contaminated.
The Worst Places to Store Your Medications
Your car. A parked car in a Louisiana summer can reach 130°F or more. Even a short errand can expose your medications to dangerous heat. Never leave prescriptions in a glove compartment or cupholder.
The bathroom medicine cabinet. It sounds like the obvious spot, but steam from showers creates the exact humidity-heat combination that degrades medication fastest. Consider a cool, dry bedroom drawer instead.
Your bag or pocket. Body heat and sun exposure add up quickly, especially if you’re outdoors for extended periods.
Medications That Require Extra Attention in Summer
Some medications are especially sensitive to heat:
- Insulin and injectables must be refrigerated or kept in an insulated case when traveling.
- Heat can compromise the effectiveness of EpiPens and emergency medications.
- Liquid medications and eye drops are more susceptible to chemical changes in high temperatures.
- Thyroid medications and certain antibiotics can degrade faster.
If you’re unsure whether your medication is heat-sensitive, the label will often specify, or you can simply ask a Carmichael’s pharmacist.
Tips for Summer Medication Safety
- Store medications in a cool, dry place—away from windows, stoves, and bathrooms.
- Use an insulated medication case when traveling or spending the day outdoors.
- Refrigerate when in doubt. But never freeze unless specifically directed.
- Review expiration dates. Heat exposure can accelerate expiration, so this is a good time to check your supply.
- Request a medication review. If you’re managing multiple prescriptions, summer is a smart time to check in with your pharmacist.
When in Doubt, Ask a Carmichael’s Pharmacist
If you suspect your medication has been compromised by heat, don’t take chances. Bring it in. Our team at Carmichael’s Retail Pharmacy can help you assess whether a replacement is needed and ensure your prescriptions are properly stored and dispensed.
We’re also fully stocked with medication cases, pill organizers, and travel health essentials to keep you protected all season long. Your health doesn’t take a summer break—and neither does our pharmacy. Stop by Carmichael’s Retail Pharmacy or give us a call.

Accredited/Certified by The Joint Commission