been adequately tested in human pregnancy to prove their safety. Very few drugs have actually been. Farewell The sensitivity Free nextel ringtones for drug categories varied between 0% and 80%.. data collection; drug utilization; pregnancy; questionnaires; reproducibility of result. A Category

X rating is assigned to drugs that should never be used during pregnancy, as there are no benefits that would exceed the potential risk.. Nearly 40% of pregnant women received category C drugs (i.e., drugs for which human safety during pregnancy

has not been established).. The Food and Drug Administration has classified every drug that's available into five pregnancy safety categories: