Antipsychotic Activity of Ethanolic Extracts of Crinum asiaticum and Crinum defixum in Animal Models.

The current study examined the antipsychotic properties of ethanolic extracts of Crinum asiaticum (EECA) and Crinum defixum (EECD). The effects of the extracts on rodents' ketamine-induced hyperactivity, amphetamine-induced stereotypy, forced swim test, conditioned avoidance response, and catalepsy were assessed. According to the findings, EECA and EECD both significantly outperformed typical antipsychotic medications in antipsychotic-like behaviours across a variety of behavioural paradigms. The extracts exhibited a 50-75% reduction in ketamine-induced hyperactivity, indicating a possible impact on glutamatergic signalling. Additionally, they greatly reduced amphetamine-induced stereotypy, suggesting a potential antagonistic interaction with the dopamine D2 receptor. Similar to haloperidol, EECD at 400 mg/kg dramatically decreased avoidance behaviour in the conditioned avoidance response test. Though less so than with haloperidol, both extracts caused catalepsy in rodents. The reversal of ketamine's effect in the forced swim test suggests that it may be effective in preventing psychosis's negative symptoms. Given that oxidative stress is a contributing factor to psychotic disorders, the antipsychotic effect of these extracts may be associated with their anti-inflammatory and antioxidant characteristics. These results bolster the long-standing usage of Crinum species in the treatment of mental illnesses and imply that they could be rich sources of new antipsychotic chemicals. To determine the active ingredients, clarify the mechanisms of action, and assess the safety and effectiveness of clinical trials, more study is necessary.