Dietary Supplement. New! CDT® Controlled-Release Nicotinic Acid 12 HR. Heart Health*. Clinically Proven to Support Heart Health & HDL*. Coated for Easy Swallowing. SCLOR s Extended Release Niacin Is formulated for consistent absorption by slowly releasing the Niacin over a full 12 hours. Patented pharmaceutical grade Controlled Delivery Technology® substantially reduces or eliminates in many cases, noticeable "flushing", "itchiness" and other side-effects typically caused by immediate rel.