Schaer Pharma is owned by the family of Michel Schaer.

1989  Founding of Tentan AG, Ramlinsburg
1998  Acquisition of OTC Pharma AG
2002  Acquisition of Ars Vitae AG
2007  Acquisition of Kräuter-Pfarrer-Künzle AG
2008  Acquisition of Eduard Vogt AG
2008  Construction of a new corporate headquarters in Itingen, BL
2009  Completion of headquarters building and move-in (May)
2009  Founding of Tentan Deutschland GmbH and Tentan Hongkong Ltd.
2009  OTC Pharma renamed "Medicoss AG".
2010  Founding of Tentan UK Ltd.
2012  Acquisition of New Care AG.