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ATNAHS added Tenormin (atenolol) and Tenoretic (atenolol and chlortalidone) to their portfolio of heritage brands in 2020

ATNAHS has continued to expand their cardiovascular medicines portfolio by acquiring the global commercial rights (excluding Japan) for Tenormin (atenolol) and Tenoretic (atenolol and chlortalidone) from AstraZeneca.

Tenormin is a beta-blocker licensed for hypertension, arrhythmias, myocardial infarction and angina.1 Tenoretic is a combination of beta-blocker and diuretic also indicated in hypertension.2

History and development of Tenormin (atenolol)

Image of Sir James Whyte Black in his labratory

The Tenormin molecule atenolol was first patented in 1969 by ICI3 and approved for medical use in the UK in 1975.3

As a classic beta blocker, Tenormin owes its development to the work of Sir James Whyte Black, a Scottish pharmacologist whose discoveries resulted in extending the lives of millions of people with heart disorders. Black’s pioneering work earned him a Nobel Prize in 1988.4

Business meeting at a conference table

A brand with a valuable heritage

$653 million global sales in 19915

A molecule with an extensive patient heritage

Nearly 19 million prescriptions in the US in 20186

In 2018, the Tenormin molecule (atenolol) was the 42nd most commonly prescribed medication in the US, with more than 18 million prescriptions.6 Between 2008 and 2018, atenolol has featured in the US top 20 'most prescribed drugs' eleven times.6


All of the information presented above is factual historical information that is available in the public domain and is included in good faith. It is not the intention to make any new or fresh claims nor to be promotional for the product in question.


  1. Tenormin LS 50mg tablets, Summary of Product Characteristics.
  2. Tenoretic 100mg/25mg film coated tablets,, Summary of Product Characteristics.
  3. CHEBI - atenolol. Available from https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:2904 [Last accessed January 2021].
  4. National Museums Scotland. Sir James Black’s Nobel Prize Medal. Available from https://www.nms.ac.uk/explore-our-collections/stories/science-and-technology/sir-james-blacks-nobel-prize-medal/ [Last accessed January 2021].
  5. Zeneca Group Annual Report 1992.
  6. ClinCalc.com. Atenolol. Available from https://clincalc.com/DrugStats/Drugs/Atenolol [Last accessed January 2021].

For further Tenormin® product information please follow this link to the relevant product page on this site.

For further Tenoretic® product information please follow this link to the relevant product page on this site.