How does extreme heat affect medicines and those taking them?

The world on July 22 experienced the hottest day on record and prolonged heat waves have become more common due to climate change, conditions that can alter medications and their effects on patients taking them. Here is what you need to know about medicines in hot weather: HOW DOES HEAT ALTER THE EFFECTS AND QUALITY OF MEDICINES? Medications for common conditions can increase patients' sensitivity to heat by impairing the body's response to high temperatures, including the ability to sweat and the rate of blood flow. Heat waves also increase the risk of deterioration for nearly all medications, whether capsules, sprays, tablets, syrups, or some other form, if they are not kept within a certain temperature range.

The heat-related effects of medications can vary based on individual health status, dosage and environmental conditions. Patients should consult their physicians about potentially adjusting doses or scheduling in hot weather, and they should keep cool by staying hydrated, carrying fans, and seeking shade or air conditioning, experts say. WHAT MEDICATIONS INCREASE SENSITIVITY TO HEAT? WHAT IS A SAFE TEMPERATURE RANGE FOR STORING MEDICATIONS? Extreme heat (and extreme cold) can significantly alter the effectiveness of prescription and over-the-counter drugs.

Some medications can tolerate temperatures up to 86 degrees Fahrenheit (30 Celsius), but in general they should be stored at 59-77 F (15-77 C) in a cool, dry place, away from sunlight. Temperature storage guidelines.