Sanofi reintroduced the tablets at the end of February, after a five-year absence, in response to “high customer demand”, it said.

The tablets “provide short-term relief from acute moderate pain when paracetamol, aspirin or ibuprofen alone are not enough”, Sanofi said.

Each tablet contains 10mg codeine phosphate, 5mg doxylamine succinate, 450mg paracetamol and 30mg caffeine, the manufacturer continued.

As codeine is addictive, Syndol can only be taken for three consecutive days, Sanofi advised.

One pack of 10 tablets retails at £3.79 and 30 tablets at £8.99.

To order, contact 0844 243 6661