People taking one of Britain's most frequently prescribed painkillers have been reminded about some of its potential side effects in an NHS note on its website. Patients should consult a GP if they continue experiencing any of these eight issues. Nefopam is a non-narcotic painkiller. According to the NHS website, the medication works to "block pain messages sent to your brain," and, as a result, your body stops recognising them. This results in relief from numerous different conditions that