Top Products Rankings based on pharmacy purchases in 13 leading countries world wide* Source: IMS Health, IMS RETAIL DRUG MONITOR See also top products, corporations and therapy areas. Leading Products Overview . For full details of this months figures visit the IMS RETAIL DRUG MONITOR section of the main imshealth.com site. A detailed report of sales for the Top 20 Products is available to buy online. * Source: IMS Monthly Midas. Any use of this information must be sourced to IMS HEALTH. Please note data collection, values and definitions. Monthly View in Depth: - Products - Therapy Areas - Corporations Monthly View by regions Navigate: Market Insight