Knowledge and awareness of nonpharmacist salespersons regarding over-the-counter drug use in patients with chronic kidney disease in Japan

Introduction Patients with chronic kidney disease (CKD) depend on advice from healthcare professionals to avoid using unsuitable over-the-counter (OTC) drugs. Recently, qualified, registered nonpharmacist salespersons became licensed to sell OTC drugs in Japan. However, registered salespersons’ knowledge and awareness of precautions regarding unsuitable OTC drugs for use in patients with CKD are unclear.