As of August 2024, (US) FDA has granted approval for a number of psychotropic drugs on market that might usher an innovative sparkle in psychopharmacotherapy. This is a recap to update busy clinicians.
Psychedelic drug therapy has gained prominence for its potential in treating various mental health conditions, including depression, post-traumatic stress disorder (PTSD), and anxiety. Psychedelic treatment differs from conventional psychiatric approaches in mode of action, legal status, and treatment approach. This work delves into the therapeutic potential, mechanisms, and regulatory approvals of key psychedelic substances like psilocybin, 3,4-Methyl enedioxy methamphetamine (MDMA), mescaline, ketamine, and Lysergic acid diethylamide (LSD). It also provides an overview of legal aspects, and regulations surrounding psychedelics in the US & Europe, emphasizing their Schedule I classification due to potential misuse. The United States Food & Drug Administration (USFDA) closely monitors psychedelics, employing expedited pathways for evaluation. Further, recent guidance from the FDA on considerations for clinical Investigations supports the safe development of psychedelics for human welfare. European Medicines Agency (EMA) regulators focus on atypical psychedelics, addressing challenges in safety and efficacy. Marketed products, such as Spravato nasal spray, face limited distribution due to safety concerns. The call for careful regulation and legislation is essential for harnessing psychedelics' potential for therapeutic benefits and human welfare.
Chronic ketamine use leads to cognitive impairments, however, the neural mechanisms underpinning these impairments are still unclear.
Many studies showed Anterior cingulate cortex (ACC)is strongly involved in cognition and drug addiction, as supported by our previous studies. The objective of this study was to assess the variations in resting-state functional connectivity (FC) changes in the right anterior cingulate cortex (ACC) of chronic ketamine users (CKUs) and their relationship with cognitive performance.
The study enrolled 28 chronic ketamine users (CKUs) and 30 healthy controls (HCs). Resting-state functional magnetic resonance imaging (fMRI) data were gathered from both groups. Cognitive functions were evaluated using the MATRICS Consensus Cognitive Battery (MCCB).
CKUs demonstrated significantly poorer cognitive performance than HCs in various cognitive domains, including Visual Learning, Speed of Processing, Working Memory, and the composite score of MCCB. Group-level comparisons revealed that CKUs exhibited enhanced functional connectivity between the right ACC and the right postcentral gyrus (PCG) compared to HCs. There was a positive relationship between the connectivity of right ACC-PCG and reasoning and problem-solving score, but there was no significant association with the characteristics of ketamine use.
CKUs showed enhanced connectivity between the right ACC and the right PCG. This enhanced functional connectivity may indicate functional compensation for cognitive deficits in CKUs, especially for reasoning and problem-solving impairments in CKUs.
Second-generation antipsychotics (SGAs) are often prescribed for patients with schizophrenia; however, SGAs are associated with the risk of metabolic syndrome (MetS). This study aimed to investigate the clinical and biochemical determinants of SGA-related MetS.
Patients with schizophrenia, aged between 20 and 65 years, and under clozapine or olanzapine treatment for at least 9 months, were recruited from a mental hospital. Demographic, comorbidity, clinical status, laboratory, and drug regimen data were collected through chart review. Circulating levels of adiponectin, thyroid hormone responsive protein, and fatty acid binding protein 4 (FABP4) were assayed. Multiple logistic regression was used to identify risk predictors of MetS.
A total of 176 participants were enrolled, including 138 (78.4 %) clozapine users and 38 (21.6 %) olanzapine users. Forty-five (25.6 %) patients were classified as having MetS. The duration of clozapine or olanzapine usage was significantly shorter in those with MetS (p=0.026) than those without MetS. Patients with MetS had a significantly higher serum FABP4 concentration than their counterparts (22.5 ± 8.8 ng/mL vs. 15.7 ± 6.7 ng/mL, p<0.001), and also a significantly lower adiponectin level (6.9 ±4.0 mg/mL vs. 11.6 ± 6.6 mg/mL, p<0.001). A FABP4 level ≥ 16.98 ng/mL (OR: 24.16, 95 % CI: 7.47–78.09, p<0.001) was positively correlated with MetS, whereas serum adiponectin level was inversely correlated with MetS (OR: 0.7980, 95 % CI: 0.70–0.90, p<0.001).
Adiponectin, FABP4, and certain clinical covariates and comedications were highly correlated with SGA-related MetS. Further studies are required to investigate the underlying mechanisms.