Valeant Pharmaceuticals International Inc will likely offer cash and stock incentives to more key U.S. staff as it aims to avoid mass departures from the heavily scrutinized company, a spokeswoman said on Wednesday. Laval, Quebec-based Valeant partially uses stock to compensate employees, but shares have fallen more than 70 percent since early August over concerns about its use of a U.S. specialty pharmacy and price spikes for some of its drugs.