What are the advantages and disadvantages of retail chain pharmacy ?

Advantages are: Economies of scale, Technology driven, Retailing their own pharma brands/generic brands along with competitors brands, Passing advantages to patients and consumer, Increase in market share and profits, and Discount parameter. Disadvantages are: No economies of scale to small medical stores, Small geographic area, No home delivery services, Winding up of medical shops, Losses from expiry of medicines, and Discounts can not be offered.