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Field Field type Value generic String Nitrofurantoin brand String Macrobid (monohydrate/macrocrystals), Macrodantin (macrocrystals), Furadantin (suspension) structure File classes List of String , delimiter: , [[:Category:Antibacterials|Antibacterial]] • [[:Category:Nitrofurans|Nitrofuran]] • [[:Category:Urinary_anti-infectives|Urinary anti-infective]] mechanism String uses String '"`UNIQ--vote-000008A1-QINU`"', '"`UNIQ--vote-000008A2-QINU`"' starting_dose String 100 mg PO BID × 5 days (Macrobid) for cystitis; 50-100 mg HS for chronic prophylaxis preparations String 25 mg/5 mL suspension; 25, 50, 100 mg capsules (Macrodantin); 100 mg Macrobid capsule fda_max String 400 mg/d (rarely used) pill_id Text routes List of String , delimiter: , Oral onset String Urinary concentration adequate within hours duration String 12 hours (Macrobid) halflife String ~20-60 minutes (plasma; not the relevant kinetic since urinary concentration matters)'"`UNIQ--ref-000008A3-QINU`"' bioavailability String ~90% (oral; food increases absorption)'"`UNIQ--ref-000008A4-QINU`"' pregnancy String '''Avoid at term (38-42 weeks) and during labor''' (risk of neonatal hemolytic anemia, especially with G6PD deficiency); generally safe in earlier pregnancy.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> legal String [[USLegal:Prescription only|Rx-only]] in US
