Cholestyramine: an effective, twice-daily dosage regimen.

Nine patients with familial hypercholesterolemia (type II hyperlipoproteinemia) and two normal volunteers were studied to ascertain the effectiveness of cholestyramine in lowering plasma cholesterol when a twice-a-day dosage regimen was compared with the same total dosage administered four times a day. The study showed that in these subjects the two regimens were equally effective. The ability to administer cholestyramine twice daily in working adults and school children should greatly enhance adherence to this agent.