thyrotropin ( tsh ) secretion was assessed in three groups of healthy volunteers before and after four days administration of 1.25 ( oh ) 2 vitamin d3 ( calcitriol ) by the oral route -1.5 micrograms/d ( group a ) , 3.0 micrograms/d ( group b ) or 3.0 micrograms/d combined with trifluoperazine ( 8-12 mg/d by mouth ) ( group c ) .
C0008318
vitamin d3
C0006674
calcitriol