Mild to moderate cognitive impairment (CI) in elderly and senile age may be caused by various neuropsychiatric diseases, including Alzheimer's disease (AD) and depression. The literature review presents the mechanisms of CI development in AD and depressive disorders, as well as their course, prognosis, and differential diagnosis. Mild and moderate depressions in AD, their clinical variants, course and treatment approaches are described. Treatment for CI is shown to focus on therapy of the underlying disease, in which the former occurs. Antidepressants are used to treat depression and depressive disorders in AD, by taking into account the efficacy and tolerability of the drugs at old age.

Atypical depression (AtD) is contrasted with classical endogenous melancholic depression and is characterized by the presence of its uncharacteristic abnormalities, but the list of the latter varies from individual symptoms (increased appetite, weight gain, drowsiness, weakness, and anxiety) and their concurrence to syndromes accompanying depression (anxiety-phobic, obsessive-compulsive, panic attacks, derealization-depersonalization, hypochondriacal syndrome). In accordance with the DSM-5 diagnostic criteria, AtD is a symptom complex that includes mood reactivity and at least two of the following symptoms: hyperphagia, hypersomnia, lead-palsy, and personality sensitivity. AtD has been described within a variety of disorders: recurrent depressive disorder, bipolar affective disorder, dysthymia, cyclothymia, and psychogenic depression. The paper describes a clinical case of atypical depressive syndrome within the framework of type 2 bipolar disorder in a 51-year-old patient. AtD was concurrent with dermatitis herpetiformis (Dühring's disease) in some depressive episodes; it was accompanied by various somatic complaints in other cases. The latest episode of AtD occurred during the COVID-19 pandemic and included obvious reactive anxiety-phobic disorders. A detailed clinical and psychopathological analysis of history data, mental state, and ongoing therapy was carried out, which clearly reflects difficulties in the differential diagnosis of AtD and the use of adequate treatment.

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Introduction To improve the effectiveness of treatment for atypical depression, it is necessary to revise the accumulated experience, taking into account new knowledge and drugs. Objectives Comparative study of the efficacy and safety of therapy for atypical depression (AtD) in the structure of bipolar affective disorder (BAD), recurrent depressive disorder (RDR) and psychogenic depression (PD). Methods Clinical and clinical follow-up methods examined 77 patients with AtD, of which 35 - with bipolar disorder, 18 - with RDR and 24 - with PD. Patients in all three groups received monotherapy with an antidepressant or a mood stabilizer, or a combination of antidepressant and antipsychotic, antidepressant and mood stabilizer, mood stabilizer and antipsychotic, as well as a combination of antidepressant, antipsychotic and mood stabilizer. Results Agomelatine was the most frequently used (27.3%) and effective in reducing MADRS in all groups both in monotherapy and in combination with other drugs. Also in the PD group, escitalopram and vortioxetine were highly effective. Of the antipsychotics, when combined with antidepressants, sulpiride was found to be the most effective. When comparing the tolerance of antidepressants in all groups showed the best results (by the CGI scale), agomelatine and venlafaxine, in the BAR group is also vortioxetine. Conclusions The best strategy for effective and safe treatment of atypical depression is the use of modern antidepressant, which does not increase the symptoms of the atypical spectrum and, if necessary, can be supplemented with some antipsychotics. Disclosure No significant relationships.

Objective: to evaluate the treatment effectiveness for atypical depression (AtD) depending on its nosology: in bipolar affective disorder (BAD), recurrent depressive disorder (RDD) and psychogenic depression (PD).Patients and methods. A total of 250 patients with depression were screened, of which 77 patients with symptoms of AtD were enrolled in the study, 35 of them with BAD, 18 with RDD, and 24 with PD. Patients in all three groups received an antidepressant (AD) or a mood stabilizer (MS) monotherapy, or a combination of AD and antipsychotic (A), AD and A, MS and A, as well as a combination of AD, A and MS. The patients' condition was assessed clinically using a specially designed questionnaire and MADRS and CGI scales at the baseline and the 2nd, 3rd, 4th, 6th, 12th weeks of treatment. Quality of life satisfaction was assessed with the Q-LES-Q-SF (Scoring the Quality-of-Life Enjoyment and Satisfaction Questionnaire) scale at the treatment onset and after the 12th week of treatment.Results and discussion. Treatment regimens that included AD were the most eff in all groups of patients with AtD. The proportion of responders among those who received AD for bipolar disorder (75% or more) was significantly higher than among those who did not receive it (˂50%). In the RDD and PD groups, patients responded significantly better to AD monotherapy (RDD – 93.2%; PD – 91.5%) compared to other regimens. Agomelatine was the most frequently used (31.8%) and effective AD in all groups. Also, escitalopram, vortioxetine, and venlafaxine (p˂0.05) showed high efficacy, good tolerance, and absence of side effects that aggravate the main symptoms that characterize AtD. Among the antipsychotics in combination with AD, sulpiride was significantly more effective in patients with PD (p˂0.05). The highest rates of quality of life satisfaction were achieved in the BAD group, the lowest – in patients with PD (p˂0.05), which indirectly indicates the quality of remission, which is determined not only by the degree of reduction of depressive symptoms but also by the patients' subjective perception of their mental state.Conclusion. The inclusion of AD in the AtD treatment regimen significantly increases its effectiveness in patients of all groups, including BAD. AtD treatment should be administered not only taking into account its clinical signs and severity, but also depending on the nosology of the disease, the characteristics of its course. During drug administration, it is necessary to consider the spectrum of side effects, especially those that increase the symptoms of AtD itself.