Multiple outlets report that the UK is facing extreme heat this week, with weather services issuing a red heat warning in parts of the country. In response, medical professionals and pharmacists warn that some medications may pose additional risks in high temperatures. The warnings focus on people taking selective serotonin reuptake inhibitors (SSRIs), including sertraline, citalopram, escitalopram and fluoxetine, and advise extra caution during hot weather. Sources also note that heat can affect how the body responds to medicines and can increase the likelihood of side effects, especially for individuals who may be more sensitive to temperature changes. Additional reporting referenced other medication categories, such as beta blockers and metformin, as potentially affected by heat, though the emphasis varies between outlets. The overall guidance in the coverage centers on taking precautions during the heatwave—such as monitoring for symptoms, staying hydrated and following medical advice—while continuing to consult healthcare providers if concerns arise about side effects or medication effectiveness in hot conditions.