Psilocybin effect on behavioral changes or addictive behavior in rats

Psilocybin is increasingly being investigated due to its therapeutic potential for depression, anxiety, and addiction. In addition to the well-known changes in perception and emotion, scientists are also looking at its influence on behavior. A recent study with rats (Sprague-Dawley, PubMed ID: 40984017) provides interesting insights into this.

The research

In this experiment, rats received a high dose every other day. psilocybin (10 mg/kg) administered. This took place in a so-called Conditioned Place Preference (CPP) paradigm. That model is used to test whether a substance is rewarding or addictive: animals are repeatedly given the substance in a specific environment, and later it is observed whether they choose that spot of their own accord. At the same time, the researchers observed various behaviors, such as head twitching, shaking movements, licking, grooming, and exploring.

The results

The key findings:

1. No addictive behaviorThe rats developed no preference for the psilocybin-coupled environment. This suggests that psilocybin is not perceived as rewarding or addictive in this model.

2. Acute behavioral changesDuring administration, the researchers observed more head twitches and shaking movements, as well as more defecation. At the same time, grooming behavior (licking) and exploratory behavior (rearing) actually decreased.

3. Temporary nature of effects: 48 hours after the last dose, no differences were visible between the psilocybin group and the control group.

Significance of these findings

These results support the idea that psilocybin not a highly addictive substance is. It does show, however, that psilocybin can influence clearly observable behavior in the short term, but that these effects disappear quickly. We often see something similar in humans: during and shortly after a session there are intense changes, but the real value lies in the psychological insights and the increased neuroplasticity.

Conclusion

Rat studies show that psilocybin induces acute but transient behavioral changes in rats, without a pattern of reward or addiction occurring. In humans, psilocybin offers the opportunity to let go of negative behavioral patterns and make new, healthier choices. The positive effect of psilocybin on humans is often longer-lasting and is estimated at two months.

Source: High dose of psilocybin induces acute behavioral changes without inducing conditioned place preference in Sprague-Dawley rats