An R package, PrAna , was utilised to extract total prescription quantities of the pharmaceuticals for the WWTP catchments for the study period 2018 and 2019. This R package generates list of general practices (GPs) and the total prescription quantity of pharmaceuticals inside each WWTP catchment, specific to a study period. This R package uses England-level monthly prescription datasets and GP information (such as GP name, address, and postcode), provided by NHS Digital.