ABSTRACT
OBJECTIVE：To investi gate the role of clinical pharmacists in the treatment of delayed excretion of acute renal failure （ARF） with epileptic seizure caused by HD-MTX in a patient ，and to provide reference for rational drug use and pharmaceutical care in such type of patients. METHODS ：A patient with diffuse large B-cell lymphoma was given HD-MTX for chemotherapy，and ARF caused by delayed methotrexate excretion occurred on the second day after methotrexate administration. Clinical physicians adjusted the rescue dose and frequency of calcium folinate but the effect was poor. Clinical pharmacists analyzed the causes of delayed methotrexate excretion by reviewing literature and combining with the patient ’s condition. It was suggested to monitor the blood concentration of methotrexate ，strengthen alkalization and hydration ，increase the volume of intravenous sodium bicarbonate from 125 mL to 250 mL，take Sodium bicarbonate tablets orally ，and monitor the pH value of urine （pH value of urine maintained above 7）. In addition ，the pharmacist told the patient to drink water as much as possible to ensure the daily urine output reached 3 000 to 4 000 mL. The blood concentration of methotrexate was 16.14 μmol/L 44 h after administration ，which proved to be excretion delay. The patient had epileptic seizure on the 13th day after methotrexate medication. The physician gave sodium valproate 0.8 g intravenously to control epilepsy. The clinical pharmacist conducted pharmaceutical care for the patient ，and found that the compliance of the patient taking Sodium bicarbonate tablets and Sodium valproate tablets orally was not good ，so medication education and pharmaceutical care were conducted ，then the patient accepted and took the drugs on time. RESULTS ： The physician adopted the suggestions of the pharmacist to monitor the blood concentration of methotrexate and performed symptomatic treatment. The urine volume of the patient increased ，the edema was reduced ，serum creatinine gradually returned to normal，and renal function recovered gradually ；the symptoms of epilepsy was controlled. CONCLUSIONS ：In the treatment process of ARF complicated with epileptic seizure caused by excretion delay of HD-MTX ，the clinical pharmacist assisted physician to improve the treatment plan and conducted pharmaceutical care and medication education for the patient ，therefore ensure the safe and rational use of drugs .
ABSTRACT
Objective: To analyze the correlation between HD-MTX blood concentration and acute drug-induced liver and kidney injury in the patients with osteosarcoma, and investigate the significance of HD-MTX concentration in the monitoring of liver and kidney toxicity. Methods: A total of 56 osteosarcoma patients treated with HD-MTX were selected, and after HD-MTX treatment, the blood concentration of MTX was detected by an HPLC-UV method in 48 h and 72 h after the administration. The liver and kidney function were measured at the same time. The correlation between the different concentrations of MTX and the change of liver and kidney func-tion was analyzed. Results: All the patients were monitored MTX blood concentration at different time points. After the 48-hour HD-MTX treatment, 4 patients (7. 14% ) were with acute drug-induced liver injury and 13 patients (23. 21% ) showed drug-induced kid-ney injury. The average C48hof liver injury was (2.90 ±0.78) μmol·L-1, and the average C48hof kidney injury was (1.65 ±1.12) μmol·L-1. After the 72-hour HD-MTX treatment, 7 patients ( 12. 50% ) were with drug-induced liver injury and 16 patients (28.57%) showed drug-induced kidney injury. The average C72hof liver injury was (0.30 ±0.17) μmol·L-1, while the average C48hof kidney injury was (0. 29 ± 0. 29) μmol·L-1. The function indices of liver ( ALT, ALP and TBIL) and kidney ( SCr) were significantly higher than those in the normal group (P<0. 05), and the blood concentration of MTX was partly significantly correlated with those indicators. Conclusion: There is a certain correlation between MTX induced injury and the blood drug concentration at par-ticular points, and C48hmay be more valuable to predict drug-induced liver and kidney injury.