Canadian pharmaceutical company Valeant Pharmaceuticals International, Inc. (NYSE:VRX) recently announced that it has raised its bid for ISTA Pharmaceuticals Inc. (NASDAQ:ISTA) to $7.50 from $6.50 per share in cash. Valeant Pharma also offered to increase the offer to $8.50 per share if ISTA offered it some confirmatory due diligence information. Valeant Pharma added that the [...]