ABSTRACT
Background and importance Isavuconazole is a new antifungal triazole authorised for invasive aspergillosis and mucormycosis. It is a therapeutic alternative to voriconazole and liposomal amphotericin B for invasive aspergillosis, and to liposomal amphotericin B in mucormycosis. Aim and objectives To analyse prescription characteristics of isavuconazole in patients with COVID-19 in an intensive care unit (ICU) as well as its effectiveness and safety. Material and methods A cross-sectional, observational study was conducted (June 2020-April 2021). Patients with COVID-19 in an ICU on treatment with isavuconazole were included. Electronic prescription program and clinical history were used to collect the following data: sex, age, comorbidities, coinfection with other pathogens in addition to SARS-CoV-2, type of therapy (empirical/targeted), duration and previous azole treatment (yes/no). Effectiveness was evaluated by symptoms resolution, reasons for treatment suspension and status (alive/death) 30 days after completion of treatment. Safety was assessed according to adverse events (AE). Results Thirty-three patients (54.5% men) with mean age of 61 (35-77) years were evaluated. Twenty-nine patients (87.9%) had comorbidities, the most frequent were: hypertension (19.1%), dyslipidaemia (12.8%), obesity (11.7%) and diabetes (8.5%). Thirty-two (96.9%) had coinfections, with a mean of 1.8 (SD 1.2) infections/patient. The most implicated pathogens were: Acinetobacter baumanii (18.8%), Candida albicans (11.6%) and Aspergillus fumigatus (8.7%). Twentythree patients (69.7%) received isavuconazole as empirical therapy and 10 (30.3%) as targeted. Mean duration of treatment was 12.3 (SD 7.5) days. Twenty-five (75.6%) patients had not previously received azole treatment, 7 (21.3%) had received voriconazole and 1 (3%) fluconazole. Symptoms resolution was observed in 12 (36.4%) cases. Seven patients (21.2%) discontinued treatment due to negative culture, 12 (36.4%) due to symptoms resolution and 14 (42.4%) due to death. At 30 days completion of treatment, 15 patients (45.5%) remained alive and 18 (54.5%) had died. AE were recorded in 6 cases (18.2%): liver disorders (n=4) and electrolytic alterations (n=2). Conclusion and relevance Most patients presented comorbidities and coinfections in addition to COVID-19. Effectiveness of isavuconazol was adequate in approximately one-third of patients, despite the high severity and clinical complexity. Approximately half the patients remained alive at 30 days following completion of treatment. Isavuconazol was well tolerated in most cases.