“…Oxygen, when prescribed as clinical therapy, should be considered to be a drug (Joint Formulary Committee 2017); documented risks of oxygen therapy include increased damage to lung function, which is potentially fatal in susceptible patients, and discomfort (Uronis et al 2008, Clemens et al 2009, Jaturapatporn et al 2010, Uronis et al 2014, psychological dependency, anxiety and altered self-image (Uronis et al 2008) and reduced mobility and participation in social activities (Uronis et al 2008, Jaturapatporn et al 2010, Breaden et al 2013, Collier et al 2017. However in the United Kingdom (UK), although oxygen has to be prescribed for home use, there is no national requirement for this to be undertaken by a qualified prescriber or specialist; it can be initiated by non-specialist health care professionals, as agreed by local protocol, and can be initiated in both primary and secondary care (Wedzicha & Calverley 2006) with follow-up and review services managed locally, although recommendations for this process are available (NHS Primary Care Commissioning 2011). There are published guidelines and prescription criteria for both emergency oxygen (O'Driscoll et al 2017) and home oxygen (Hardinge et al 2015) but these primarily focus on its use for treatment and symptom management in hypoxaemic patients, that is patients with a resting PaO2 ≤7.3 kPa or ≤8.0 kPa with other complications (Hardinge et al 2015); the guidelines are less clear for non-hypoxaemic palliative patients.…”