Warner Chilcott has agreed to buy Procter & Gamble’s prescription drug business for about $3 billion, people briefed on the matter said Sunday.

An announcement of the deal may be made as soon as Monday, these people said.

The deal is expected to be financed by about $4 billion in debt, to be provided by six banks, led by Bank of America and JPMorgan Chase. The lending group also includes Barclays Capital, Citigroup, Credit Suisse and Morgan Stanley.

The sale process for the Procter & Gamble unit was run by Goldman Sachs. Among the unit’s products is Actonel, a treatment for osteoporosis.

The deal, one of the largest during a slow summer for mergers and acquisitions, will help bolster Warner Chilcott, a publicly traded drug maker based in Ireland that sells products focused on women’s health care and skin care products.