As the UK faces its third heatwave of 2026, healthcare professionals are urging people on certain medications to take extra precautions. The Met Office has confirmed yellow and amber heat health alerts across much of the country, signaling the potential dangers of high temperatures.
Jason Murphy, Head of Pharmacy at Chemist4U, has highlighted key concerns for patients taking commonly prescribed medications such as SSRIs, hormonal contraceptives, insulin, blood pressure drugs, ADHD stimulants, inhalers, and EpiPens.
“With rising temperatures and active heat-health alerts, it’s vital for those on regular medication to consider how the heat might impact their treatment,” Murphy explained.
READ MORE: Tewkesbury High Street to Close for Busy Summer Food and Craft Market
READ MORE: Massive Traffic Delays on M5 Following Three-Vehicle Collision – Live Updates
One major concern is SSRIs, including sertraline, citalopram, and fluoxetine, which affect the hypothalamus — the part of the brain responsible for temperature regulation. This interference may cause abnormal sweating, dizziness, or delayed recognition of dehydration.
Hormonal contraceptives are also vulnerable to heat exposure. Products like the combined pill, mini pill, patch, and vaginal ring contain hormones sensitive to temperature. Typically designed to be stored below 25°C, prolonged exposure above 30°C can degrade these hormones, reducing the contraceptive’s effectiveness. Storage in hot environments—such as cars, handbags, bathroom cabinets, or windowsills—could lead to unexpected pregnancy risks.
Signs of compromised contraception include discoloration, stickiness, or a softer texture. In such cases, users should begin a new pack and use a backup protection method, such as condoms, for at least seven days.
Murphy stresses, “It’s essential not to stop any prescribed medication because of heat, but be aware of possible effects and consult your pharmacist or GP if you notice anything unusual.”
Being informed and cautious can help ensure safety and medication effectiveness during the ongoing heatwave.