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Chlorhexidine (CHX) is an antiseptic used in a wide range of human and veterinary healthcare applications. It is effective against a wide range of bacteria and yeasts, including antibiotic-resistant species. 

The Pertinax brand includes a range of novel materials which, when in contact with a moist environment, release CHX gradually over an extended period. The duration and dose of the CHX release can be controlled by formulation parameters. 

Pertinax was first developed at the University of Bristol in the UK, and Pertinax Pharma Ltd. was founded in 2015 to commercialise the Pertinax technologies.