Table 1.

Summary of included studies.

	Study type	Setting	Subjects of study	Intervention	Outcomes
Langley 2018 et al. [30]	ITS	United Kingdom	Antibiotics and inhaled corticosteroids	A cost-feedback approach to prescribers: the provision of information on the cost of drugs in electronic prescribing to clinicians in a hospital setting	Price outcomes (weekly expenditure; weekly cost per patient)
Moodley 2019 et al. [22,23]	ITS	South Africa	Top-50 originator medicines dispensed in private sector by volume and corresponding generics	The Single-Exit-Price (SEP): mandatory disclosure of fixed medicine prices, that are composed of the weighted average of the sales price, the logistics fee and value-added taxes. All discounts and off-invoice rebates are removed. Applies to the private sector. The disclosed prices are made publicly available on the South African Medicine Price Registry website	Price outcome (relative change in medicine price)

ITS=Interrupted time series.