Punishing and cardiovascular effects of intravenous histamine in rats: pharmacological selectivity.
Histamine acts as a punisher through H1 receptors, and a simple two-lever choice test spots the effect fast.
01Research in Context
What this study did
Scientists gave rats two levers. Pressing one lever delivered food. Pressing the other lever also delivered food but added a shot of histamine into the vein. The team then tested drugs that block histamine receptors to see which receptor type matters. They watched which lever the rats picked across several doses.
What they found
Rats quickly learned to avoid the histamine lever. Higher histamine doses made the avoidance stronger. A drug that blocks H1 receptors stopped the effect. A drug that blocks H2 receptors did not. The result shows histamine punishes behavior through H1 receptors, not H2.
How this fits with other research
Fontes et al. (2022) also used a two-lever rat choice setup. They found a steady, moderate shock intensity worked better than slowly increasing weak shocks. Fahmie et al. (2013) extends that line by showing a drug, not shock, can serve as the punisher and that the effect is receptor-specific.
McMillan (1973) and Wilson et al. (1973) tested how other drugs change punished pressing. They saw that amphetamine sometimes raised low punished rates. Their work is a predecessor: they mapped how drugs alter responding already suppressed by shock, while the 2013 paper makes the drug itself the punisher.
Goldman et al. (1979) used money loss to punish human button pressing. Humans, like rats, shifted choice away from the punished option. The pattern matches across species and punisher type, strengthening external validity.
Why it matters
You now have a rapid animal model to screen punishing drug effects without electric shock. If a new compound cuts punished responding and the H1 blocker reverses it, you know the drug likely acts as a punisher via that receptor. Use the same choice layout when you consult on pharmacological studies or when designing brief preference assessments that include mild aversive outcomes.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Set up a concurrent-choice probe: give the client two tasks, one with a mild known aversive, and count which task is picked to quickly see if the aversive truly suppresses behavior.
02At a glance
03Original abstract
Although drugs may serve as reinforcers or punishers of operant behavior, the punishing function has received much less experimental attention than the reinforcing function. A sensitive method for studying drug-induced punishment is to assess choice for a punished response over an unpunished response. In these experiments, rats chose between pressing one lever and receiving a sucrose pellet or pressing another lever and receiving a sucrose pellet plus an intravenous injection of histamine. When sucrose was delivered equally frequently for either the punished or the unpunished response, rats selected the unpunished lever consistently, but decreases in the punished response did not differ as a function of intravenous histamine dose (0.1-1 mg/kg/inj). Changing the procedure so that sucrose was delivered on the unpunished lever with p = .5 increased the rats' responding on the punished lever with saline injections. In addition, the same range of histamine doses produced a much larger range of responses on the punished lever that was dose dependent. Using these procedures to assess the receptors mediating histamine's effects, the histamine H1 -receptor antagonists, pyrilamine and ketotifen, antagonized the punishing effect of histamine, but the histamine H2 -receptor antagonist ranitidine did not. However, ranitidine pretreatments reduced histamine-induced heart-rate increases to a greater extent than did the histamine H1 -receptor antagonists when administered at the same doses examined under conditions of histamine punishment. Overall, the present findings extend the general hypothesis that activation of histamine H1 -receptors mediates the punishing effects of histamine. They also introduce methods for rapidly assessing pharmacological mechanisms underlying drug-induced punishment.
Journal of the experimental analysis of behavior, 2013 · doi:10.1002/jeab.46