Extreme Heat and Medication Use Warning
The National Weather Service has issued an Extreme Heat Warning for the western Lower Peninsula today. Michigan is expected to experience high temperatures throughout the week and into the July 4th holiday weekend. Everyone must take precautions during extreme heat, particularly those with health concerns, young children, and older adults. Certain medications may heighten the risk of adverse health effects in elevated temperatures.
The Michigan Poison & Drug Information Center advises the public to be mindful of the increased dangers associated with the following medications when combined with extremely hot weather:
Medications That Reduce Sweating (Highest Risk):
These medications can hinder your body's ability to cool itself through sweating.
Benadryl (diphenhydramine)
Oxybutynin and tolterodine (for overactive bladder)
Benztropine and trihexyphenidyl (for Parkinson's disease and tremors)
Scopolamine patches (for motion sickness)
Water Pills (Diuretics):
These medications promote fluid loss and can lead to dehydration.
Hydrochlorothiazide
Furosemide (Lasix)
Torsemide
Spironolactone
Antipsychotic Medications:
These drugs can disrupt the body’s temperature regulation and may lessen awareness of overheating.
Haloperidol
Olanzapine
Risperidone
Quetiapine
Clozapine
Heart Medications:
Certain medications for high blood pressure or heart disease can make it more challenging for the body to adapt to heat.
Beta blockers (such as metoprolol or propranolol)
Some calcium channel blockers (such as verapamil or diltiazem)
Stimulant Medications:
Medications used to treat ADHD can elevate body temperature, especially during physical activity.
Adderall (amphetamine)
Ritalin (methylphenidate)
Sedatives and Opioid Pain Medications:
These can induce drowsiness or reduce awareness of rising temperatures.
Lorazepam (Ativan)
Diazepam (Valium)
Oxycodone
Morphine
Methadone
Recreational Drugs (Especially High Risk):
Certain illegal or recreational drugs can rapidly increase body temperature and are a common cause of life-threatening heat stroke, especially during exercise or crowded events.
Cocaine
Methamphetamine
MDMA (“Ecstasy” or “Molly”)
Synthetic cathinones (“bath salts”)
Alcohol Use During Hot Weather:
Combining hot weather with alcohol consumption raises health risks. Both heat and alcohol can lead to dehydration. Increased perspiration from heat and frequent urination from alcohol can quickly deplete fluids, increasing the risk of heat stroke. Additionally, the risk of health complications increases when alcohol is consumed during extremely hot weather alongside the medications listed above and other medications.
Protect Yourself During Hot Weather:
If you are taking any of these medications, consider the following precautions:
Drink plenty of fluids unless your doctor has advised you to limit intake.
Remain in air-conditioned or shaded areas during the hottest parts of the day.
Wear lightweight, light-colored clothing.
Take frequent breaks if working or exercising outdoors.
Never leave children, older adults, or pets in a parked vehicle.
Be aware of the warning signs of heat illness.
Check on elderly family members or those with disabilities.
Seek Emergency Care:
Call 911 immediately if someone has experienced:
Confusion or unusual behavior
Fainting or inability to wake up
A body temperature of 104°F (40°C) or higher
Seizures
Hot skin accompanied by severe weakness or collapse
Do not discontinue prescription medications without consulting your healthcare provider first. For most individuals, medications can be taken safely with additional precautions during periods of extreme heat. Being knowledgeable about your medications and taking steps to stay cool can help reduce your risk of heat-related illnesses.
For further information about medication safety or poison-related questions, call the Michigan Poison & Drug Information Center help line at 1-800-222-1222. Our specialists are available to help all callers around the clock and every day of the year.
