Current Reviews in Clinical and Experimental Pharmacology - Volume 21, Issue 1, 2026

Ketamine, a substance used for anesthesia and known for inducing dissociation, can lead to addiction and the development of severe withdrawal symptoms. Ketamine alters brain networks before affecting somesthetic sensation. Ketamine abuse was especially prevalent in East and Southeast Asia, and its popularity has continued to expand globally in recent decades. Ketamine is gaining popularity in the public and private sectors as a cheaper off-label depression treatment. Unfortunately, ketamine may cause side effects, such as heart and blood vessel instability, respiratory depression, liver injury, hallucinations, etc. The pain-relieving and mental effects of ketamine might induce reliance; thus, it should be used cautiously. This review highlights the neurobiological processes underpinnings of ketamine's addictive potential, withdrawal, and its effects on brain networks like the prefrontal cortex, hippocampus, and mesolimbic pathway, which play vital roles in decision-making, memory, and reward processing. In addition, the involvement of neurotransmitter systems, specifically glutamate and dopamine, in mediating the addictive properties of ketamine and the neuroadaptive changes that occurred during withdrawal are also discussed. It also explains that low-dose ketamine can alter the secretion of stress hormone cortisol and hypothalamic-pituitary-adrenal (HPA) axis dysregulation, possibly attributed to the current repurposing study of ketamine as a fast-acting antidepressant. Understanding these pathways is essential for developing effective ketamine addiction treatments, managing withdrawal symptoms, and possibly reversing brain changes for the betterment of human health and psychological well-being.

Examining antifungal resistance in dermatophytes is crucial in infectious diseases, dermatology, and clinical microbiology. The increasing occurrence of resistant infections and their influence on the effectiveness of therapy seem overwhelming. This study examines the present condition of antifungal resistance in dermatophytes, highlighting the need for ongoing and up-to-date research. Fungal diseases constantly change, and fungi have developed new resistance mechanisms. Here, we analyze the historical context of research on antifungal resistance, examining the variables that contribute to the development of resistance, such as the growing use of antifungals in clinical and agricultural contexts. We also explore the consequences of resistance to antifungal agents in clinical practice and public health. The review emphasizes the significance of new diagnostic technologies, like next-generation sequencing, in comprehending resistance mechanisms. It also underscores the crucial role of international collaboration in tackling this worldwide health concern. In conclusion, the paper emphasizes the need for continuous research to adjust to the evolving epidemiology of dermatophyte infections, create efficient treatment approaches, and guide public health interventions. This will ensure that the management of antifungal resistance is grounded in the most up-to-date scientific knowledge and optimal methods.

Depression is a prevalent mood disorder with significant public health implications. Despite extensive research, its precise causes remain inadequately understood. Recently, interest has surged in the role of the gut microbiome and its metabolites in the pathophysiology of depression. This review aims to provide a comprehensive overview of the relationship between gut microbiota, its metabolites, and depression while exploring potential mechanisms influencing the efficacy of antidepressant medications. A narrative review methodology was employed, synthesizing recent studies utilizing a multi-omics approach. We examined alterations in gut microbiome composition and metabolite production in individuals diagnosed with depression, discussing the technical tools and methods commonly applied in this research area. The findings indicate that individuals with depression show significant alterations in gut microbiome composition, notably an imbalance in Firmicutes, Bacteroidetes, and Actinobacteria. Changes in metabolite production, including short-chain fatty acids, tryptophan, and bile acids, were also observed. Moreover, the review highlights that antidepressant medications may exert their therapeutic effects by modulating gut microbiota and its metabolites. This review emphasizes the intricate interplay between gut microbiota, its metabolites, and depression, revealing critical insights into the mechanisms underlying antidepressant efficacy. We recommend that future research focus on elucidating these interactions to develop innovative therapeutic strategies, potentially transforming the management of depression through microbiota-targeted approaches.