Male or female \> or greater than 18 years of age

On a stable dose of atorvastatin

LDL-C \> or = to 115 mg/dL and \< or = to 250 mg/dL

TG \< or = to 300 mg/dL

Women are not pregnant or breast-feeding or planning to become pregnant

Women of child-bearing potential had a hysterectomy or tubal-ligation, or

women were post menopausal, or

women practiced an acceptable method of contraception as specified in the protocol

A Study to Determine the Effect of WelChol Tablets on Cholesterol in Patients Who Have Been Taking Atorvastatin for at Least 4 Weeks.