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.
DRUG CLASS AND MECHANISM: Nifedipine belongs to a class of medications called calcium channel blockers (CCBs) that are used to treat angina (heart pain), high blood pressure, and abnormal heart rhythms. verapamil (Covera-HS, Veralan PM, Calan).