Drugs used in chemotherapy, such as hydroxychloroquine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading.
“To limit use of hydroxychloroquine to currently approved indications, there have been new restrictions placed on who can initiate therapy using it. Only certain types of specialists will be able to prescribe hydroxychloroquine to new patients (see information for health professionals below). General practitioners and other medical practitioners (e.g. hospital Resident Medical Officers (RMOS) and doctors in training) can continue to prescribe repeats for hydroxychloroquine to patients in line with the registered indications for patients in whom the medication was prescribed prior to 24 March 2020. From 24 March 2020, general practitioners and doctors in training can only prescribe these medicines for continued treatment of patients where initial treatment has been authorised by one of the specialists.”