MHRA warns of sun and heat risks for medication users

The Medicines and Healthcare products Regulatory Agency (MHRA) has issued warnings regarding the risks of heat and sun exposure for individuals taking certain medications. As temperatures rise, health officials are highlighting how various prescription and over-the-counter drugs can interfere with the body's ability to regulate temperature, maintain hydration, or protect against UV radiation.

Specific medications identified include: • Painkillers: Ibuprofen and naproxen may increase sun sensitivity. • Antibiotics: Doxycycline and tetracycline can increase the risk of sunburn. • Heart/Blood Pressure Medications: Diuretics can increase fluid loss and dehydration, while beta blockers may reduce the body's response to heat stress. • Mental Health Medications: Some antidepressants and antipsychotics can impair temperature regulation. • Other treatments: Acne medications (isotretinoin, topical retinoids), antifungals (voriconazole), and certain DMARDs used for arthritis can increase photosensitivity.

Dr. Alison Cave, MHRA Chief Safety Officer, advised that simple precautions such as staying hydrated, wearing protective clothing, using sunscreen, and avoiding peak midday sun can significantly reduce risks. Vulnerable groups, including older adults and those with chronic heart or lung diseases, are encouraged to consult patient information leaflets and monitor for signs of heat stress like dizziness or unusual fatigue.