Isocarboxazid
Severe
Textbook
Risk of hypertensive crisis.
Source: Harrison 22e · p1743
Drug reference
furazolidone
Nitrofuran derivative · Antibacterial
Nitrofuran derivativeAntibacterialATC null
CDSCO approved
EXCRETION
—
not curated
INTERACTIONS
7 major
SEVERE in our sources
PREGNANCY
X
FDA category + note
Top interactionssee all 7 →
- IsocarboxazidSevereTextbookHarrison 22e · p1743
- MoclobemideSevereTextbookHarrison 22e · p1743
- PhenelzineSevereTextbookHarrison 22e · p1743
- ProcarbazineSevereTextbookHarrison 22e · p1743
Mechanism
null
Indications
Giardiasis (inferior to metronidazole or tinidazole)Bacterial enteritis (not first-line treatment)Food poisoning diarrhoeas (not first-line treatment)Bacillary dysentery (not first-line treatment)
Dosing
- Adult
- 100 mg TDS for 5–7 days (for giardiasis).
Pharmacokinetics
Bioavailability
Partly absorbed from intestines.
Excretion
Excreted in urine (which turns orange).
Side effects
Common
nausea (mild and infrequent)headache (mild and infrequent)dizziness (mild and infrequent)nauseavomitingbrown urinerectal itchingheadache
Serious
- hemolytic anemia
- disulfiram-like reactions
- mao inhibitor interactions
Pregnancy & lactation
Pregnancy
X
Drug interactions
Moclobemide
Severe
Textbook
Risk of hypertensive crisis.
Source: Harrison 22e · p1743
Phenelzine
Severe
Textbook
Risk of hypertensive crisis.
Source: Harrison 22e · p1743
Procarbazine
Severe
Textbook
Risk of hypertensive crisis.
Source: Harrison 22e · p1743
Rasagiline
Severe
Textbook
Risk of hypertensive crisis.
Source: Harrison 22e · p1743
Selegiline
Severe
Textbook
Risk of hypertensive crisis.
Source: Harrison 22e · p1743
Tranylcypromine
Severe
Textbook
Risk of hypertensive crisis.
Source: Harrison 22e · p1743
Related guidelines
Ask House about furazolidone
Continue into a citation-backed clinical answer with the drug context already attached.
Sources: KD Tripathi 7e, Harrison 22e·Verified: 2026-05-10 · House clinical team