Antibiotics are the most frequently prescribed medications in pregnanc
y, their application and choice should be made according to the highes
t criteria. Penicillins and cephalosporins can be safely used in pregn
ancy, however, their side effects such as allergic reactions present a
greater therapeutic problem. Tetracyclines, chloramphenicol and quino
lones are strictly contraindicated in pregnancy. 5-nitroimidazole deri
vatives, aminoglycosides and sulfonamides are indicated only in severe
infections. Not only the risk of malformation is increased in the emb
ryonic stage, i.e. in the first 8 weeks of gestation, but also at the
time of delivery with the use of drugs as sulfonamides, which can caus
e icterus.