Expert comment: What you need to know about medications and hot weather
As temperatures rise across the United Kingdom, and with the Met Office issuing a rare red weather warning, Dr Lynne Marrow from the University of Salford has shared her view on the impact that the heatwave could have for users of certain medications.
“During periods of hot weather, we sometimes see concerns online and in the media about the potential extra risks associated with certain medications. It’s important not to stop taking prescribed medications without taking medical advice, but understanding the science behind what’s happening may help people stay safe and well in the heatwave.
“It is a very small area of the brain called the hypothalamus that regulates our body temperature, checking that our core temperature stays around 37 degrees Celsius.
“If the hypothalamus senses that our internal temperature is becoming too hot, it sends signals to the skin, glands, blood vessels and organs, setting in motion mechanisms to cool us down.
“Some antidepressants and antipsychotic medications can alter the brain’s ability to regulate body temperature.
“Tricyclic antidepressants such as imipramine and amitriptyline can impair sweating, so we may overheat if we are taking these medications.
“On the other hand, selective serotonin reuptake inhibitors (SSRIs), such as Prozac, can make us sweat more, causing dehydration.
“SSRIs are also associated with hyponatremia (reduction of sodium levels in the blood), which can affect fluid balance, and consequently blood pressure and the proper function of nerves and muscles, all of which become more apparent when we are heat challenged.
“Issues that may stem from these symptoms include dehydration, increased risk of fainting or falling, muscle cramps, reduced alertness and judgement, heat rash and heatstroke.
“It is important that people do not stop taking prescribed medications without consulting their GP – if you have any concerns or symptoms you are not happy with, book an appointment with your doctor.
“In terms of managing through the heatwave, people should drink regular amounts of non-alcoholic fluids but avoid drinking large amounts of water in a short space of time.
“Stay cool by avoiding strenuous exercise, staying indoors during the hottest parts of the day, wearing lightweight, loose-fitting clothes, and keeping your home as cool as possible.”
Dr Lynne Marrow is a Senior Lecturer in Psychology and Programme Leader for the MSc Applied Psychology (Addictions) programme at the University of Salford.
For all press office enquiries please email communications@salford.ac.uk.
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