Wiktionary(0.00 / 0 votes)Rate these synonyms: 1  filter(noun) Synonyms: 2  filter(noun) To sort, sift, or isolate. 3  filter(noun) To diffuse; to cause to be less concentrated or focused. 4  filter(noun) To pass through a filter or to act as though passing through a filter. 5  filter(noun) To move slowly or gradually; to come or go a few at a time.
Macrobid (nitrofurantoin monohydrate/macrocrystals) Capsules. 1  To reduce the development of drug-resistant bacteria and maintain the effectiveness of Macrobid and other antibacterial drugs, Macrobid should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria.
Macrobid (nitrofurantoin) is an antibiotic that fights bacteria in the body. Macrobid is used to treat urinary tract infections. Macrobid may also be used for purposes not listed in this medication guide. You should not take Macrobid if you have severe kidney disease, urination problems, or a history of jaundice or liver problems caused by nitrofurantoin.