[5][6] Reed Business Information sold MIMS Ireland to Metropolis International in 2009.

[8] Dr John O'Connell, an Irish general practitioner who later became the Minister for Health, proposed the concept of a compact, user-friendly medical guide for use by doctors when prescribing drugs to English publisher Alf Morgan.

[9] As drug names in Ireland were somewhat different from those in the UK, Morgan and O'Connell both set up their own versions of MIMS in their respective home countries.

[5][6] In addition, MIMS Ireland contains a preliminary section which each month includes:[citation needed] Though MIMS Ireland is supported by advertisement and educational grants from the pharmaceutical industry, it is an independently written and edited.

[citation needed] Several supplements, focusing on specific areas, have been published alongside MIMS Ireland.