Pfizer's (PFE +0.5%) Lipitor cholesterol drug is holding onto ~37%-38% of the overall U.S....

|About: Pfizer Inc. (PFE)|By:, SA News Editor

Pfizer's (PFE +0.5%) Lipitor cholesterol drug is holding onto ~37%-38% of the overall U.S. market as it competes with generic versions, CEO Ian Read says, "basically where we expected to be." But he says it would be difficult for Pfizer to hold more than its current share, as some patients are encountering resistance at pharmacies wanting to fill prescriptions with a generic.