Incorrect dose or frequency | 25 089 (25.6) | 254 (27.4) | 1.0 |
Incorrect quantity | 19 619 (20.0) | 19 (2.0) | 0.1 |
Incorrect drug | 13 951 (14.2) | 185 (19.9) | 1.3 |
Incorrect strength or concentration | 10 508 (10.7) | 187 (20.2) | 1.8 |
Incorrect prescriber | 8454 (8.6) | 0 (0) | 0.0 |
Incorrect patient | 5685 (5.8) | 32 (3.4) | 0.6 |
Incorrect duration of treatment | 5048 (5.1) | 18 (1.9) | 0.4 |
Incorrect dosage form or formulation (including not splitting tablets as per patient’s request) | 3281 (3.3) | 32 (3.4) | 1.0 |
Omitted medication or dose | 1919 (2.0) | 58 (6.23 | 3.0 |
Incorrect route of administration | 1121 (1.1) | 7 (0.8) | 0.6 |
Incorrect storage | 857 (0.9) | 3 (0.3) | 0.4 |
Incorrect third-party billing | 803 (0.8) | 1 (0.1) | 0.1 |
Drug therapy problem — drug–drug/OTC/natural health product interaction | 506 (0.5) | 19 (2.0) | 3.8 |
Drug therapy problem — documented allergy | 447 (0.5) | 31 (3.3) | 6.9 |
Drug therapy problem — contraindication | 356 (0.4) | 12 (1.3) | 3.4 |
Expired medication | 191 (0.2) | 9 (1.0) | 4.7 |
Drug therapy problem — adverse drug reaction | 188 (0.2) | 56 (6.0) | 29.8 |
Drug therapy problem — drug–disease interaction | 63 (0.1) | 3 (0.3) | 4.8 |
Drug therapy problem — drug–food interaction | 11 (0.0) | 2 (0.2) | 18.2 |
Total | 98 097 (100) | 928 (100) | – |