Based on the standards of the U.S. Food and Drug Administration (FDA), medications for pregnant women are categorized into five groups. Such standard has become an important reference for many obstetricians’ drugs. The extractions below are the basic principles and common drugs in every classification levels, which will be helpful for mothers.
Level A: There is no damage to the fetus in clinical research. Minimal negative effects of these drugs are expected.
Commonly known medicines: Vitamin C, vitamin D, vitamin E, etc. It does not mean that these drugs are guaranteed absolutely safe. Consumption should be taken under doctor’s instruction, including dosage and frequency.
Level B: Animal studies have showed no damage to fetuses, but lack of clinical observations; or these medications have side effects in animal reproduction studies, but clinical evidences are still required.
Commonly known drugs: Amoxicillin, ampicillin, cephalosporins, erythromycin, metronidazole, clotrimazole, acyclovir, insulin etc.
Level C: Animal studies indicated that these drugs may lead to teratogenic fetus or embryo death, but there are no research conducted on pregnant women. This kind of drugs only can be used if the benefits weigh the side effects.
Commonly known drugs: Aspirin, hydrocortisone, gentamicin, nifedipine, theophylline, nystatin, and so on.
Level D: Studies have proved that these drugs have an adverse effect on the human fetus, these drugs are not recommended unless they play more important role such as saving the pregnant woman, or treating other serious illness.
Commonly known drugs: Busulfan, iodine, sulfamethoxazole, carbamazepine, lorazepam etc.
X level: In medication research on both animals and humans, the medication did serious harm to the fetus. They are may be harmful for pregnant women. Therefore, the pregnant patients or those who are trying to conceive should not take these medications.
Commonly known drugs: Ribavirin (antiviral drugs), estazolam, fluvastatin, lovastatin, paclitaxel, etc.
This article is contributed by ReLife International Medical Center. For more details on advanced medical services provided for infertility, please kindly consult us. We are happy to provide a medical solution for your inquiry.