This is an ongoing attempt to list pharmaceutical mergers and major subsidiaries.
The columns are sortable (in ascending or descending order) by clicking on the arrows in the headers.
Anyone wishing to provide corrections, additions, or to help with maintaining/referencing this list contact me at ablumsohn-3@yahoo.co.uk.
| ACompany | BCompany | Year | Result | IsNow | Subsidiary of |
|---|---|---|---|---|---|
| Sterling Drug | Bayer (US) | 1918 | Sterling Drug | ||
| Bayer (US) | Sterling Drug | 1918 | Sterling Drug | ||
| Bayer | IG Farben | 1925 | IG Farben Conglomerate | ||
| Hoechst | IG Farben | 1925 | IG Farben Conglomerate | ||
| Ethicon | 1949 | Johnson and Johnson | |||
| IG Farben | Bayer | 1951 | Re-emerges From IG Farben | ||
| Bayer | IG Farben | 1951 | Re-emerges From IG Farben | ||
| IG Farben | Hoechst | 1951 | Re-emerges From IG Farben | ||
| Hoechst | IG Farben | 1951 | Re-emerges From IG Farben | ||
| Allen and Hanburys | Glaxo | 1958 | Glaxo | GlaxoSmithKline | |
| Glaxo | Allen and Hanburys | 1958 | Glaxo | GlaxoSmithKline | |
| Cilag | 1959 | Johnson and Johnson | |||
| McNeil Laboratories | 1959 | Johnson and Johnson | |||
| Cilag | 1959 | Johnson and Johnson | |||
| Janssen | 1961 | Johnson and Johnson | |||
| Schering Corporation (US) | Plough | 1971 | Schering-Plough | ||
| Plough | Schering Corporation (US) | 1971 | Schering-Plough | ||
| Parke-Davis | Warner-Lambert | 1973 | Warner-Lambert | Pfizer | |
| Warner-Lambert | Parke-Davis | 1973 | Warner-Lambert | Pfizer | |
| Miles Laboratories | 1978 | Bayer | |||
| Miles Canada | 1978 | Bayer | |||
| Cutter Laboratories | 1978 | Bayer | |||
| Searle | 1985 | Searle | Pfizer | Monsanto | |
| Ayerst Laboratories | Wyeth | 1987 | Wyeth | Wyeth | |
| Wyeth | Ayerst Laboratories | 1987 | Wyeth | Wyeth | |
| Sterling Winthrop | Eastman Kodak | 1988 | Sterling Winthrop/EK | ||
| Bristol-Myers | Squibb | 1989 | Bristol-Myers Squibb | ||
| Squibb | Bristol-Myers | 1989 | Bristol-Myers Squibb | ||
| Beecham | Smithkline Beckman | 1989 | SmithKline Beecham | GlaxoSmithKline | |
| Smithkline Beckman | Beecham | 1989 | SmithKline Beecham | GlaxoSmithKline | |
| Evans | Medirace | 1990 | Medeva | UCB | |
| Medirace | Evans | 1990 | Medeva | UCB | |
| Rhone-Poulenc | Rorer | 1990 | Rhone Poulenc Rorer | Sanofi-Aventis | |
| Rorer | Rhone-Poulenc | 1990 | Rhone Poulenc Rorer | Sanofi-Aventis | |
| Cilag | Janssen | 1992 | Janssen-Cilag (some countries) | Johnson and Johnson | |
| Janssen | Cilag | 1992 | Janssen-Cilag (some countries) | Johnson and Johnson | |
| Sanofi | Sterling Winthrop | 1992 | Sanofi Winthrop | Sanofi-Aventis | |
| Sterling Winthrop | Sanofi | 1992 | Sanofi Winthrop | Sanofi-Aventis | |
| Farmitalia Carlo Erba | Kabi Pharmacia | 1993 | Kabi Pharmacia | Fresenius | |
| Kabi Pharmacia | Farmitalia Carlo Erba | 1993 | Kabi Pharmacia | Fresenius | |
| McNeil Laboratories | Ortho Pharmaceutical | 1993 | Ortho-McNeil Pharmaceutical | Johnson and Johnson | |
| Bayer | Sterling Winthrop (OTC division ex SKB) | 1994 | Bayer | ||
| Sterling Winthrop (OTC division ex SKB) | Bayer | 1994 | Bayer | ||
| Hoechst | Roussel Laboratories | 1994 | Hoechst Roussel | Sanofi-Aventis | |
| Roussel Laboratories | Hoechst | 1994 | Hoechst Roussel | Sanofi-Aventis | |
| Hoffmann?La Roche | Syntex | 1994 | Hoffmann?La Roche | Hoffmann?La Roche | |
| Syntex | Hoffmann?La Roche | 1994 | Hoffmann?La Roche | Hoffmann?La Roche | |
| Glaxo | Wellcome | 1995 | Glaxo-Wellcome | GlaxoSmithKline | |
| Wellcome | Glaxo | 1995 | Glaxo-Wellcome | GlaxoSmithKline | |
| Hoechst | Marion Merrell Dow | 1995 | Hoechst Marion Roussel | Sanofi-Aventis | |
| Marion Merrell Dow | Hoechst | 1995 | Hoechst Marion Roussel | Sanofi-Aventis | |
| Cilag | Janssen | 1995 | Janssen-Cilag | ||
| Janssen | Cilag | 1995 | Janssen-Cilag | ||
| Pharmacia | Upjohn | 1995 | Pharmacia and Upjohn | Pfizer | |
| Upjohn | Pharmacia | 1995 | Pharmacia and Upjohn | Pfizer | |
| Imperial Services | Shire | 1995 | Shire | ||
| Shire | Imperial Services | 1995 | Shire | ||
| Monarch Pharmaceuticals | 1995 | King | |||
| Meridian Medical Technologies | 1995 | King | |||
| Parkdale Pharmaceuticals | 1995 | King | |||
| Ciba-Geigy | Sandoz | 1996 | Novartis | ||
| Sandoz | Ciba-Geigy | 1996 | Novartis | ||
| Fisons | Rhone Poulenc Rorer | 1996 | Rhone Poulenc Rorer | Sanofi-Aventis | |
| Rhone-Poulenc Rorer | Fisons | 1996 | Rhone Poulenc Rorer | Sanofi-Aventis | |
| Cordis | 1996 | Johnson and Johnson | |||
| Alliance Sante | Unichem | 1997 | Alliance Unichem | Alliance Boots | |
| Unichem | Alliance Sante | 1997 | Alliance Unichem | Alliance Boots | |
| Amersham International | Nycomed ASA | 1997 | Amersham | ||
| Nycomed ASA | Amersham International | 1997 | Amersham | ||
| Baxter | Immuno International | 1997 | Baxter | ||
| Immuno International | Baxter | 1997 | Baxter | ||
| Alpharma | Cox | 1998 | Alpharma | Actavis | |
| Cox | Alpharma | 1998 | Alpharma | Actavis | |
| Astra AB | Zeneca | 1998 | AstraZeneca | ||
| Zeneca | Astra AB | 1999 | AstraZeneca | ||
| Scholl | Seton | 1998 | Seton Scholl | SSL International | |
| Seton | Scholl | 1998 | Seton Scholl | SSL International | |
| International Clinical Laboratories | Smithkline Beckman | 1998 | Smithkline Beckman | GlaxoSmithKline | |
| Smithkline Beckman | International Clinical Laboratories | 1998 | Smithkline Beckman | GlaxoSmithKline | |
| Hoechst Marion Roussel | Rhone Poulenc Rorer | 1999 | Aventis Pharma | Sanofi-Aventis | |
| Rhone Poulenc Rorer | Hoechst Marion Roussel | 1999 | Aventis Pharma | Sanofi-Aventis | |
| Axis Biochemicals | Shield Diagnostics | 1999 | Axis-Shield | ||
| Shield Diagnostics | Axis Biochemicals | 1999 | Axis-Shield | ||
| Celltech | Chiroscience | 1999 | Celltech Chiroscience | UCB | |
| Chiroscience | Celltech | 1999 | Celltech Chiroscience | UCB | |
| Fresenius | Kabi | 1999 | Fresenius | Fresenius | |
| Kabi | Fresenius | 1999 | Fresenius | Fresenius | |
| Ethical Generics | Genus | 1999 | Genus | ||
| Genus | Ethical Generics | 1999 | Genus | ||
| Pharmacia and Upjohn | Monsanto | 1999 | Pharmacia | Pfizer | |
| Sanofi Winthrop | Synthelabo | 1999 | Sanofi-Synthelabo | Sanofi-Aventis | |
| Synthelabo | Sanofi Winthrop | 1999 | Sanofi-Synthelabo | Sanofi-Aventis | |
| London International | Seton Scholl | 1999 | SSL International | ||
| Seton Scholl | London International | 1999 | SSL International | ||
| Celltech Chiroscience | Medeva | 2000 | Celltech | UCB | |
| Medeva | Celltech Chiroscience | 2000 | Celltech | UCB | |
| Glaxo Wellcome | Smithkline Beecham | 2000 | GlaxoSmithKline | GlaxoSmithKline | |
| Smithkline Beecham | Glaxo Wellcome | 2000 | GlaxoSmithKline | GlaxoSmithKline | |
| Pfizer | Warner-Lambert Co | 2000 | Pfizer | Pfizer | |
| Warner-Lambert Co | Pfizer | 2000 | Pfizer | Pfizer | |
| Searle (Monsanto) | Pharmacia and Upjohn | 2000 | Pharmacia | Pfizer | |
| Monmouth | Shire | 2000 | Shire | ||
| Shire | Monmouth | 2000 | Shire | ||
| Bristol-Myers-Squibb | DuPont | 2001 | Bristol-Myers Squibb | ||
| DuPont | Bristol-Myers-Squibb | 2001 | Bristol-Myers Squibb | ||
| Antigen | Goldshield | 2001 | Goldshield | ||
| Goldshield | Antigen | 2001 | Goldshield | ||
| Norton | (Rebranding) | 2001 | IVAX | TEVA | |
| ALZA | 2001 | Johnson and Johnson | |||
| Hoffmann?La Roche | Chugai Pharmaceutical | 2002 | Roche majority owner Chugai | ||
| Chugai Pharmaceutical | Hoffmann?La Roche | 2002 | Roche majority owner Chugai | ||
| Hoffmann?La Roche | Novartis | 2003 | Novartis owns 33% Roche[1] | ||
| Novartis | Hoffmann?La Roche | 2003 | Novartis owns 33% Roche[1] | ||
| Pfizer | Pharmacia | 2003 | Pfizer | Pfizer | |
| Pharmacia | Pfizer | 2003 | Pfizer | Pfizer | |
| Searle | Pfizer | 2003 | Pfizer | Pfizer retire Searle name | |
| British Biotech | Vernalis | 2003 | Vernalis | ||
| Vernalis | British Biotech | 2003 | Vernalis | ||
| Alliance Pharma | Dermapharm | 2004 | Alliance Pharma | Alliance Boots | |
| Dermapharm | Alliance Pharma | 2004 | Alliance Pharma | Alliance Boots | |
| Bayer | Roche Consumer Health | 2004 | Bayer | ||
| Roche Consumer Health | Bayer | 2004 | Bayer | ||
| Eldon Laboratories | Martindale | 2004 | Martindale | ||
| Martindale | Eldon Laboratories | 2004 | Martindale | ||
| Aventis | Sanofi-Synthelabo | 2004 | Sanofi-Aventis | ||
| Sanofi-Synthelabo | Aventis | 2004 | Sanofi-Aventis | ||
| APS/Berk | (Renamed) | 2004 | TEVA | ||
| Celltech | UCB | 2004 | UCB | UCB | |
| Actavis | Alpharma | 2005 | Actavis | Actavis | |
| Alpharma | Actavis | 2005 | Actavis | Actavis | |
| Hoffmann?La Roche | Genentech | 2004 | Roche majority owner G'tech | ||
| Genentech | Hoffmann?La Roche | 2004 | Roche majority owner G'tech | ||
| Aventis Pasteur MSD | (Name change Vaccine div) | 2005 | Sanofi Pasteur MSD | ||
| Alliance Unichem | Boots | 2006 | Alliance Boots | Alliance Boots | |
| Boots | Alliance Unichem | 2006 | Alliance Boots | Alliance Boots | |
| Altana Pharma | Nycomed | 2006 | Nycomed | ||
| Nycomed | Altana Pharma | 2006 | Nycomed | ||
| TEVA | IVAX | 2006 | TEVA | ||
| IVAX | TEVA | 2006 | TEVA | ||
| Lifescan | 2006 | Johnson and Johnson | |||
| Bayer | Schering | 2007 | Bayer Schering | ||
| Schering | Bayer | 2007 | Bayer Schering |