UK prescribing data for sputum clearance medications and devices
| Year | Carbocisteine (treatment years) | Carbocisteine cost | Tiotropium (treatment years) | Tiotropium cost | OPEP device (n) | OPEP device cost |
| 2013 | 102 203 | £18 731 563 | 295 691 | £129 183 487 | 976 | £36 570 |
| 2014 | 152 242 | £25 929 656 | 403 363 | £175 912 591 | 1836 | £68 791 |
| 2015 | 168 299 | £28 316 401 | 409 224 | £178 550 070 | 2177 | £81 509 |
| Total | 422 744 | £72 977 620 | 1 108 278 | £483 646 148 | 4989 | £1 86 870 |
Data from OpenPrescribing.net, EBM DataLab, University of Oxford, 2017 (https://openprescribing.net/).
Treatment year was calculated by dividing number of items prescribed per year by 12. For carbocisteine, paediatric preparations were excluded.
OPEP, oscillatory positive expiratory pressure.