Table 2.
Mean antipsychotic dosages prescribed to patients in the Department of Veterans Affairs who were given long-term antipsychotic prescriptions, by number of antipsychotics received
Polypharmacy |
Monotherapy |
|||||||
---|---|---|---|---|---|---|---|---|
Dosage |
Dosage |
|||||||
Antipsychotic | N | M | SD | N | M | SD | Wilcoxon z | p |
Second generationa | ||||||||
Clozapine | 327 | 507.7 | 203.2 | 1,233 | 496.9 | 193.5 | .92 | .356 |
Olanzapine | 3,064 | 15.8 | 8.3 | 11,346 | 14.0 | 7.4 | 10.65 | <.001 |
Quetiapine | 757 | 347.3 | 240.5 | 1,242 | 309.8 | 199.4 | 2.46 | .014 |
Risperidone | 2,313 | 4.8 | 3.0 | 9,276 | 4.3 | 2.6 | 4.96 | <.001 |
First generationb | ||||||||
Chlorpromazine | 678 | 287.8 | 295.8 | 1,728 | 316.0 | 276.7 | −3.47 | .001 |
Fluphenazine | 566 | 768.7 | 686.9 | 1,740 | 777.9 | 635.2 | −1.08 | .282 |
Haloperidol | 1,484 | 703.4 | 637.5 | 4,153 | 675.2 | 634.2 | 2.25 | .024 |
Loxapine | 372 | 821.9 | 651.3 | 833 | 796.5 | 680.4 | 1.01 | .312 |
Mesoridazine | 88 | 308.6 | 251.7 | 227 | 288.4 | 247.4 | .53 | .596 |
Molindone | 32 | 687.5 | 599.7 | 107 | 708.9 | 650.9 | −.18 | .855 |
Perphenazine | 399 | 209.0 | 184.6 | 1,765 | 196.5 | 177.5 | .79 | .433 |
Pimozide | 12 | 210.4 | 132.1 | 7 | 333.7 | 307.9 | 1.13 | .260 |
Thioridazine | 571 | 204.0 | 177.0 | 2,309 | 210.2 | 173.4 | −1.17 | .241 |
Thiothixene | 465 | 414.4 | 338.3 | 1,757 | 372.5 | 311.9 | 2.63 | .009 |
Trifluoperazine | 410 | 368.7 | 310.6 | 1,452 | 357.1 | 299.7 | .25 | .806 |
All dosages expressed in milligrams
All dosages expressed in chlorpromazine equivalents