Abstract
There is an emerging concern about pharmaceutical waste management and it has become necessary to green the supply chain by correctly disposing of expired drugs and reducing levels of preventable pharmaceutical waste. There are issues of returns and recalls that pharmaceutical companies face and a proper system should be in place for such instances.Sustainability is required in pharmaceutical sector therefore organizations in South Africa should start applying green principles by moving from reactive monitoring of general environment to proactive practices such as reverse logistics particulary post consumption of drugs in order to raise ecological efficiency. This study uses the system dynamics approach to illustrate and investigate the effects of reverse logistics on return of unused drugs for correct disposal and the effects of illegal dumping on environment. At the same time, to understand the dynamic interactions between elements of the drug disposal system through development of casual loop diagrams.