Not all medications in pregnancy are considered safe. Always consult your doctor.

Generally, the medications in pregnancy that you take during this time do not enter the baby, but in some cases can do so and cause birth defects or harm. The greatest risk of harm to the fetus occurs during the first weeks of pregnancy, when the most important organs are developing. Ideally you should avoid medications in pregnancy and if you are taking them from before, tell your doctor at the first appointment.

The US Food and Drug Administration (FDA) classifies medications in pregnancy as safe as they are as follows:

• Category A: Medications in pregnancy that have been evaluated and are considered safe. They include: folic acid, vitamin B6 and medications for the thyroid in moderate form, or in prescribed doses.
• Category B: medicines used during pregnancy and do not appear to cause serious birth defects or other problems, such as some antibiotics, acetaminophen, aspartame, famotidine, prednisone, insulin and ibuprofen (before the first trimester of pregnancy but not in the latest).
• Category C: drugs most likely to cause problems. They usually contain warnings about using them only if the benefits of taking them outweigh the risks, such as prochlorperazine, fluconazole, ciproflozacin and some antidepressants.
• Category D: medicines that have obvious risks to the fetus; Include alcohol, lithium, phenytoin, and chemotherapy.
• Category X: medicinal products that are proven to cause birth defects and should never be taken during pregnancy; Include skin treatments for cystic acne and psoriasis, sedative thalidomide and diethylstilbestrol.