In April 2021 the UK's National Institute for Health and Care Excellence (N.I.C.E.) updated its advice guidelines to state that no pharmaceuticals should be prescribed for undiagnosed pain.
"People with chronic primary pain should not be started on commonly used drugs including paracetamol, non-steroidal anti-inflammatory drugs, benzodiazepines or opioids. This is because there is little or no evidence that they make any difference to people's quality of life, pain or psychological distress, but they can cause harm, including possible addiction."
(Ref NICE.org.uk)