Choline chloride modulates learning, memory, and synaptic plasticity impairments in maternally separated adolescent male rats
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When symptoms return early A subset of people on standard maintenance notice their symptoms come back well before the next scheduled dose
0.36 (0.25 to 0.53) for incident suicidal ideation and 0.51 (0.31 to 0.86) for recurrent suicidal ideation among patients with type 2 diabetes).9 A third study found protective effects of GLP-1 receptor agonists compared with DPP-4 inhibitorson the risk of suicide attempts among patients with type 2 diabetes (odds ratio 0.46, 95% CI 0.37 to 0.58),10 and a fourth study found no effect of GLP-1 receptor agonists compared with SGLT-2 inhibitors or DPP-4 inhibitors on the risk of suicidal ideation (hazard ratios 1.05 (95% CI 0.77 to 1.43) and 0.96 (0.72 to 1.27), respectively) or suicidal behaviours (0.82 (0.41 to 1.67) and 0.92 (0.42 to 2.01), respectively) among older adults with type 2 diabetes.11 Another study conducted among patients with both type 2 diabetes and obesity observed no association between GLP-1 receptor agonist use and a composite of suicidal ideation and self-injury (hazard ratio 1.04, 95% CI 0.35 to 3.14),12 and a final study observed a reduced risk of self-harm (hazard ratio 0.77, 0.65 to 0.91) but a non-significant increase in the risk of suicide (1.25, 0.83 to 1.88) among a diverse group of patients on GLP-1 receptor agonists compared with SGLT-2 inhibitors.13 Overall, some of these observational studies had methodological shortcomings, including prevalent user bias,9 immortal time bias,9 important confounding,9101113 limited generalisability,11 exclusion of patients at high risk (such as those with a history of psychiatric conditions),811 and limited sample sizes generating imprecise estimates.812 Biological mechanisms The absence of an independent association between GLP-1 receptor agonists and suicidality suggests that the effects of these drugs on the hypothalamic-pituitary-adrenal axis, sudden weight loss, or brain derived neurotrophic factor dysregulation are not sufficient to induce suicidal ideation, self-harm, or suicide.1415161718 Although these biological mechanisms may contribute to the complex interplay of factors influencing suicidality, they do not seem to act independently in causing such outcomes in GLP-1 receptor agonist users
