Experimental verification of factors influencing calcium salt formation based on a survey of the development of ceftriaxone-induced gallstone-related disorder.

Ceftriaxone (CTRX) forms salts with calcium (Ca) in the gall bladder and bile duct, and induces the formation of gallstones. In this study, factors of CTRX-induced gallstone formation were extracted from the results of a retrospective survey using the Japanese Adverse Drug Event Report (JADER), and the causal relationship between the factors and gallstone formation was investigated. From JADER, 136 patients who developed 'gallstone-related disorder' with CTRX as a suspected drug were extracted. The incidence of gallstone-induced adverse effects was high in patients treated with CTRX at a dose exceeding the normal daily dose and in children younger than 10 years old, suggesting that CTRX at a high level is a factor for gallstone formation. Thus, after mixing CTRX and Ca2+ at different concentrations under different pH condition, the number of particles in the solutions was measured using a Coulter counter. As a result, the number of minute particles significantly increased at all pH values when Ca2+ and CTRX were mixed at a concentration of 10 mEq/L or higher and 1.5 g/L or higher, respectively. At pH 6.5 or 7.0, visible crystals were detected when 25 mEq/L of Ca2+ and 2.0 g/L of CTRX were mixed. Based on these findings, attention should be sufficiently paid to the development of 'gallstone-related disorder' in pediatric patients and in patients treated with CTRX at a dose exceeding the normal dose. Furthermore, gallstone formation and growth may be promoted when CTRX and Ca2+ coexist at high concentrations under low pH conditions.

Changes in Psychological Condition during Cancer Chemotherapy.

BACKGROUND: Psychological disorders are prevalent in cancer patients and their psychological condition can change during cancer chemotherapy and influence their quality of life and adherence to treatment. PATIENTS AND METHODS: This prospective observational study enrolled cancer patients undergoing chemotherapy. The enrolled patients were assessed at the start of chemotherapy, after the first course of chemotherapy, and more than 2 months later by themselves and by medical staff using four different items. The cancer patients assessed themselves using the Numerical Rating Scale for Anxiety (NRS-A), Hospital Anxiety and Depression Scale subscale for anxiety (HADS-A) and subscale for depression (HADS-D), and patient-reported outcomes version of the Common Terminology Criteria for Adverse Events (PRO-CTCAE). A pharmacist or nurse assessed them using Common Terminology Criteria for Adverse Events (CTCAE) v5.0. RESULTS: This study enrolled 109 patients. The anxiety and depression scores were highest at the start of chemotherapy and declined thereafter. Patients with history of psychiatric disorders or taking psychotropic drugs had higher scores than those without such disorders or treatments (P < 0.05), and tended to maintain these high scores at the second and third HADS-A and -D assessments. The scores assessed by the patients themselves were higher than those assessed by the medical staff. CONCLUSION: Psychiatric distress scores were highest when commencing chemotherapy and declined thereafter. The patients with history of psychiatric disorders or taking psychotropic drugs kept higher scores of HADS-A and -D during whole chemotherapy courses.