Dopamine D1 receptor family agonists, SK&F38393, SK&F77434, and SK&F82958, differentially affect locomotor activities in rats

Dopamine D1 receptor family agonists, 2,3,4,5,-tetrahydro-7,8-dihydroxy-1phenyl-1H-3-benzazepine (SK&F38393), 3-allyl-2,3,4,5-tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine (SK&F77434), and 3-allyl-6-chloro-2,3,4,5-tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazep ine (SK&F82958), were compared for their behavioral effects on horizontal movement time, rearing time, stereotypy time, and thigmotaxis time. All agonists resulted in biphasic effects with attenuation followed by potentiation (0.01-10.0 mg/kg, SC). While SK&F38393 did not potentiate horizontal movement and rearing times, and had minor effects on thigmotaxis, SK&F77434 and SK&F82958 potentiated horizontal movement and rearing behaviors and attenuated thigmotaxis. The results were discussed in terms of the binding characteristics and current receptor theory.

In vitro coadsorption of acetaminophen and N-acetylcysteine onto activated carbon powder

The in vitro adsorption and coadsorption of acetaminophen and N-acetylcysteine using simulated gastric (pH 1.2) and intestinal (pH 7.0) conditions were examined for a range of charcoal-to-drug ratios between 1 and 7. Although both substances were adsorbed by the activated carbon, the adsorption of acetaminophen was greater than that of N-acetylcysteine for both acidic and neutral pH conditions. In the coadsorption studies, the acetaminophen was always adsorbed to a greater extent than the N-acetylcysteine. These results agree with previous in vivo studies that suggest that the concomitant use of N-acetylcysteine and activated carbon powder is an appropriate treatment for acetaminophen overdose.