What is a class "c" medicine for preg. women mean?

The official definition is: "Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks."


This means that there is a good chance that this is bad for the baby but it is not proven to be bad. It is okay to take if the benefits outweigh the risk but only if it is REALLY necessary (ex. epilepsy, arrhythmias and other life-threatening disorders). Talk seriously with the doctor before taking anything that is category C.

What is a class "c" medicine for preg. women mean?
The US Food and Drug Administration rates every drug with a letter that identifies how safe a medicine appears to be in pregnancy. Ratings of category “A” indicate proven safety. Ratings of “A” are rare for medications, because a drug must be studied in large experimental trials to gain this rating. Most medicines are rated with a “B” or a “C” class rating. “B” ratings are provided when we have a reasonable amount of experience with a medication in pregnant women (even if no large trials have been conducted), and no reason to believe that the medicine would cause harm. ****If a medicine has not been used in pregnant women, or if it can be shown to cause any harms when it is used in pregnant animals, that medicine will get a class “C” rating or a worse rating. Your pharmacist or your doctor can help you to review the rating of any medication.****
Reply:oh, and I believe they don't do experimental trials on pregnant women because it's unethical.