Table 1

Plasma prolactin levels (nanograms per milliliter; mean ± S.E.M.) measured 1 h after s.c. injection of solvent or the indicated doses of the compounds

Test CompoundDoseNtestedProlactin1-aN>20 ng/ml/Ntested
mg/kg, s.c. ng/ml; mean ± S.E.M.
Solvent0771-b 3.5  ± 0.74 /77
Amisulpride0.00063512  ± 31 /5
0.0025522  ± 73 /5
0.015115  ± 495 /5
0.043505  ± 1773 /3
0.633464  ± 553 /3
2.53464  ± 483 /3
10.03504  ± 1423 /3
Risperidone0.002556.6  ± 3.20 /5
0.01550  ± 75 /5
0.045469  ± 1495 /5
0.165560  ± 1325 /5
Olanzapine0.0452.9  ± 1.20 /5
0.16576  ± 324 /5
0.635118  ± 295 /5
2.55388  ± 1035 /5
Quetiapine0.16511  ± 30 /5
0.63528  ± 143 /5
2.55130  ± 215 /5
10.05410  ± 1095 /5

The last column lists the fraction of rats displaying prolactin levels > 20 ng/ml (adopted as all-or-none criterion for significant prolactin release).

  • 1-a  Values below the detection limit of 0.80 ng/ml were set at 0.80 ng/ml for the purpose of calculating mean values.

  • 1-b  Exclusive of one control rat displaying an exceptional high value of 1050 ng/ml.