The agency was recommended for the work and won the retained account following a non-competitive pitch.
Camilia is produced by global homeopathic medicines firm Boiron.
Clarion will launch a campaign that will focus on a national awareness drive through earned and paid-for media along with influencer engagement.
The agency is also responsible for rebuilding the brand’s website and implementing an SEO and SEM strategy to drive discovery online.
Amanda Meyrick, MD of Clarion Communications, said: "Launching a product into a new market gives us the opportunity to work in partnership from the beginning to establish Camilia in the UK, and we are looking forward to seeing the results of our planning and creativity."