The majority of pregnant women do not complain of morning sickness until the 6th week of pregnancy, 2 weeks after a missed period. But for some women, that nagging feeling can start as early as one week after conception, a full week before a missed period. Changes in hormones account for the queasiness that occurs.
DRUG CLASS AND MECHANISM: Niacin (nicotinic acid, vitamin B3) is a part of the normal diet that is essential to various chemical reactions in the body.
put simply niacin also known as vitamin b3 nicotinic acid or vitamin pp is one of the complex b vitamins used by your body it plays an important role in the digestive process where it turns the carbohydrate from your food into energy niacin also helps to keep your nervous system functioning healthily