Abstract: OBJECTIVE To explore the methods of drug treatment and pharmaceutical care for immune-associated cystitis induced by camrelizumab, and to improve the ability of pharmaceutical care of clinical pharmacists.METHODS An immune-associated cystitis, which occurd in a gastric cancer patient after taking chemotherapy combined with camrelizumab was analyzed and discussed. The clinical pharmacist assisted physicians in formulating treatment plan.RESULTS The physician adopted comments and suggestions of the clinical pharmacist, and the patient's cystitis was gradually improved.CONCLUSION By collaborating with physicians, the clinical pharmacist have implemented pharmaceutical care and intervention for immune-associated cystitis which providing methods and ideas for pharmaceutical care and drug therapy of immune-related adverse events.