Health experts are warning of the growing risks of heat waves to tens of millions of Americans taking psychiatric medications, as temperatures in the United States soar to record levels.
As the heat wave intensifies, with temperatures potentially exceeding 90 degrees Fahrenheit (about 32 degrees Celsius) and reaching nearly 100 degrees (38 degrees Celsius) in some areas, approximately 46 million people taking antidepressants and antipsychotics face an increased risk of heat stress and heatstroke.
These include common medications such as Zoloft, Lexapro, and Giodon, used to treat depression, schizophrenia, and bipolar disorder, which may affect the body's ability to regulate its temperature.
Doctors explain that these medications alter serotonin and dopamine levels in the brain, which in turn affects the hypothalamus, the part of the brain responsible for regulating body temperature. When this system is disrupted, the body may not respond normally to heat, either through sweating or cooling itself.
According to weather forecasts, major cities such as New York, Chicago, Dallas, Atlanta, and Rayleigh will record high temperatures, with a heat feel that could reach around 110 degrees Fahrenheit (43 degrees Celsius).
Experts warn that some users of these drugs may not sweat enough during the heat, which could lead to a dangerous rise in body temperature, or conversely, they may suffer from excessive sweating that causes dehydration.
Signs of heat stress usually appear as dizziness, nausea, headache, muscle cramps, and rapid heartbeat, in addition to disturbances in sweating, ranging from increased to absent.
Heatstroke, on the other hand, is a more serious and potentially life-threatening condition. It occurs when the body's internal temperature rises to levels that may cause organ damage, loss of consciousness, or seizures, and is a medical emergency requiring immediate intervention.
The risks increase when exercising outdoors or in direct sunlight, especially given the effect these medications have on the body's ability to regulate temperature. Alcohol and caffeine can also worsen the situation due to their diuretic effect and the resulting fluid loss.
Risk-increasing factors also include certain other medications such as blood pressure medications, diuretics, antihistamines that reduce sweating, and stimulants used to treat ADHD that may raise body temperature and heart rate.
The elderly are also more susceptible to these risks due to impaired body temperature regulation with age, in addition to a decreased sense of thirst, while young children face a similar risk because their bodies are unable to adapt quickly to heat.
Doctors confirm that high doses of antidepressants may increase the likelihood of these complications, which calls for extreme caution during hot periods.
Experts advise drinking fluids regularly throughout the day, and preferably using drinks containing salts to compensate for what the body loses through sweating, in addition to using cooling methods such as cold compresses, fans, and cold showers.
Experts stress that these medications should not be stopped or their dosages modified without consulting a doctor, despite the potential risks, as sudden cessation may lead to withdrawal symptoms or a deterioration in mental health.
