Paracetamol intravenous drug solution, designed to be administered by drip and infused into a patient's bloodstream during surgery. Also known as acetaminophen, paracetamol is a painkilling (analgesic) drug. The label warns that this 100 millilitre vial is only to be used in patients weighing more than 33 kilograms. Smaller doses are used in children, with larger doses for those weighing over 50 kilograms. Photographed in a UK hospital in 2014.