This is an extension study for patients having unusually high absorption of non-cholesterol sterols, resulting in heart-related diseases. This study will evaluate the long term safety and the ability to lower cholesterol levels with an investigational drug.

The duration of treatment is 52 weeks.

Inclusion Criteria:

• Patients with elevated sitosterol levels while taking current medication

Exclusion Criteria:

• Patient has a condition which, in the opinion of the investigator, might pose a risk to the patient, interfere with participation in the study, or does not meet the additional criteria as required by the study.