For something that affects millions every month, period pain remains surprisingly poorly treated. A recent analysis of supermarket transaction data from over three million shoppers found that paracetamol is the most purchased painkiller for menstrual cramps – despite being a less effective option than ibuprofen for this type of pain. The finding highlights a mismatch between what people buy and what actually works. Period pain, or dysmenorrhoea , is caused by hormone-like chemicals called