Hi sis, this was prescribed to me by my doctor pero di ko alam na buntis ako nun. May nakita kasing konting bacteria sa result ng UA ko. A week after ko matapos yung prescribed number of meds nalaman ko na buntis ako and fortunately sabi ng OB ko safe naman daw yung nitrofurantoin for preggy and please note that if it was prescribed by your OB it's safe.