Momo K, et al. - This study strived to assess the efficacy and safety of indomethacin (IM) oral spray (OS) as a pain control therapy for oropharyngeal mucositis due to anticancer chemo- and radiotherapy in patients with head and neck carcinomas and haematological tumours. For pain relief, the present IM spray was an effective and safe preparation. For oropharyngeal mucositis in cancer patients, it could be used as an alternative therapeutic option.