Drug company Apotex Health Corp. is increasing the size of its initial public offering to about $1.3 billion, up from its earlier plan for $1 billion.

The company says it now plans an offering of between 54.17 million and 65 million shares at a price per share between $20.00 and $24.00, compared with an earlier plan for 41.67 million and 50 million shares in the same price range.