NHS Warns 800,000 Fentanyl Users: Avoid Grapefruit Juice to Prevent Dangerous Side Effects Monday, November 10, 2025 nhs fentanyl painkillers grapefruit drugs sideeffects opioids warnings medication health The NHS has issued a crucial health advisory for the 800,000 people in England prescribed fentanyl, one of the UK’s most potent opioid painkillers. Patients are being urged to avoid consuming grapefruit juice while taking … Read More