Heat increases medication risks, German doctor warns

Taking medication in the morning often happens without considering the day's weather forecast, yet high temperatures can significantly alter how drugs affect the body. Heat can increase the risk of side effects and even make some substances unusable, according to Beate Müller, Director of the Institute for General Medicine at the University of Cologne and a member of the German Medical Association's Drug Commission.

Müller explains that heat triggers the body's cooling mechanisms. Blood vessels in the skin and extremities widen to release heat, which can reduce blood flow to other organs. Combined with fluid loss from sweating, this can make the blood more concentrated and reduce overall blood volume.

“

The blood vessels in the skin and extremities widen, to release heat through increased blood flow. At the same time, blood flow to other organs can decrease. If a lot of fluid is lost in addition, the blood becomes more concentrated and the blood volume decreases.

As a result, medications may be present in higher concentrations than usual, leading to stronger effects than intended. This intensified action can place a greater burden on the heart, kidneys, and circulatory system, posing potential health risks to individuals relying on these drugs.

“

As a result, medications can be present in higher concentrations and have a stronger effect than under normal conditions. This can increase the strain on the heart, kidneys, and circulatory system.