Prescriptions for opioids jump following co-proxamol ban
By Lilian Anekwe
Opioid prescriptions have jumped during the withdrawal of co-proxamol, with GPs apparently struggling to find adequate means of pain control for some patients.
Prescriptions for morphine have risen by more than 40% and those for tramadol by two-thirds since co-proxamol use was first reduced in anticipation of the drug's withdrawal.
An analysis for the Medicines and Healthcare Products Regulatory Agency, obtained by Pulse under the Freedom of Information Act, reveals prescriptions for co-proxamol plummeted from 835 million in 2004 - the year prior to legislation on its withdrawal - to 121 million in 2007.
But over the same period, opiod prescriptions overall rose by 40%. Prescriptions for morphine rose by 44%, from 757,000 in 2004 to 1,093,000 in 2007, and tramadol prescriptions increased by 61%, from 3,130,000 to 5,036,000.
Co-proxamol was removed from the British National Formulary on 1 January last year, but the NHS Information Centre analysis shows GPs continued to prescribe co-proxamol to approximately 150,000 patients in England on a named-patient basis.
The MHRA downplayed the impact of the withdrawal and said the ageing population was to blame for increasing demand for analgesics. But the agency's pharmacovigilance group concluded: ‘Opioids, especially tramadol, have followed an increasing trend and some patients may have been switched to this class of analgesic.'
Dr Adam Bajkowski, a GP in Wigan and president of the primary care rheumatology society, said the analysis suggested the MHRA's argument that full-strength paracetamol was as effective as co-proxamol was flawed: ‘If GPs are having to switch patients to a stronger opioid, then it suggests the MHRA's reasoning wasn't really true.'