<prompt> Nicotinamide is preferred over Niacin because?Flushing is seen with niacinAbdominal pain is seen with niacinBreathlessness is seen with niacinLess bioavailability  <response>: Flushing is seen with niacin REF: Nutrition Almanac by John D. Kirschmann, Nutrition Search, Inc page 31 Niacin causes sudden release of histamine which produces ceain se which are not seen with nicotinamide Intense flushing Tingling Numbness Throbbing headache due to cerebral vasodilation. 