AstraZeneca
Pfizer has agreed to buy the small molecule antibiotics business of UK rival AstraZeneca Getty Images

Pharmaceutical company Pfizer has agreed to buy the small molecule antibiotics business of UK rival AstraZeneca in a deal potentially worth $1.5bn (€1.3bn, £1.1bn).

Confirming the move on Wednesday (24 August), Pfizer said it will pay $550m upon completion of the deal followed by a further unconditional $175m in January 2019.

Additionally, the US company could pay up to $250m in milestones, and up to $600m in sales-related payments and recurring, double-digit royalties on future sales of antibiotics brands Zavicefta and ATM-AVI in certain markets.

The AstraZeneca portfolio being bought by Pfizer also includes antibiotics brands Merrem, Zinforo and CXL.

In a statement, AstraZeneca said the sale agreement did not impact its financial guidance for 2016.