Table 3.
Non-Completion Rates of Ordered Tests (> 100 Users)
| Drug | Test | Number of users | Non-completion rate |
|---|---|---|---|
| **DIURETIC-LOOP | BMP* or K†+Cr‡ | 2,967 | 23.56 % |
| **AZOLE ANTIFUNGAL | AST§ | 247 | 20.24 % |
| **DIURETIC-POTASSIUM SPARING | BMP or K+Cr | 1,434 | 14.30 % |
| NIACIN | AST | 201 | 12.44 % |
| THIAZOLIDINEDIONE | AST | 552 | 12.32 % |
| PHENYTOIN | AST | 170 | 11.76 % |
| THYROID REPLACEMENT | TSH‖ | 3,972 | 10.90 % |
| GEMFIBROZIL | AST | 785 | 10.57 % |
| **METHOTREXATE | CBC# | 264 | 9.47 % |
| CARBAMAZEPINE | AST | 122 | 9.02 % |
| DIGOXIN | DIGOXIN | 594 | 8.75 % |
| FENOFIBRATE | CBC | 344 | 8.43 % |
| PHENYTOIN | PHENYTOIN | 221 | 8.14 % |
| FENOFIBRATE | AST | 435 | 8.05 % |
| CARBAMAZEPINE | CARBAMAZEPINE | 112 | 8.04 % |
| ACE/ARB¶ | BMP | 11,602 | 6.27 % |
| COLCHICINE | CBC | 463 | 6.05 % |
| **CARBAMAZEPINE | CBC | 152 | 5.92 % |
| **METHOTREXATE | AST | 269 | 4.83 % |
| VALPROATE SODIUM | CBC | 126 | 4.76 % |
| **METFORMIN | CREATININE | 2,945 | 4.65 % |
| COLCHICINE | CREATININE | 543 | 4.24 % |
| **METHOTREXATE | CREATININE | 263 | 3.80 % |
| ALLOPURINOL | CREATININE | 894 | 3.58 % |
| DIURETIC-THIAZIDE | BMP or K+Cr | 7648 | 3.16 % |
| POTASSIUM | POTASSIUM | 1,752 | 2.85 % |
| DIGOXIN | POTASSIUM | 844 | 2.25 % |
| DIGOXIN | CREATININE | 845 | 2.25 % |
*BMP, basic metabolic panel; †K, potassium; ‡Cr, creatinine; §AST, aspartate aminotransferase; ‖TSH, thyroid stimulating hormone; ¶ACE inhibitors, angiotensin-converting enzyme inhibitors; ARBs, angiotensin receptor blockers; #CBC, complete blood count; **Indicates a black box warning on the drug-test pair