Isoniazid
![500px](https://upload.wikimedia.org/wikipedia/commons/4/41/Activation_of_isoniazid_with_NAD.jpg)
|MedlinePlus = a682401
|DailyMedID = Isoniazid
|pregnancy_AU = A
|pregnancy_AU_comment =
|routes_of_administration =
By mouth,
intramuscular,
intravenous
|ATC_prefix = J04
|ATC_suffix = AC01
|ATC_supplemental =
|legal_AU =
|legal_BR =
|legal_CA = Rx-only
|legal_CA_comment =
|legal_DE =
|legal_NZ =
|legal_UK =
|legal_US = Rx-only
|legal_UN =
|legal_status =
|protein_bound = Very low (0–10%)
|metabolism = liver; CYP450: 2C19, 3A4 inhibitor
|elimination_half-life = 0.5–1.6h (fast acetylators), 2-5h (slow acetylators)
|excretion = urine (primarily), feces
|synonyms = isonicotinic acid hydrazide, isonicotinyl hydrazine, INH, INAH, INHA
|CAS_number_Ref =
|CAS_number = 54-85-3
|PubChem = 3767
|DrugBank_Ref =
|DrugBank = DB00951
|ChemSpiderID_Ref =
|ChemSpiderID = 3635
|UNII_Ref =
|UNII = V83O1VOZ8L
|KEGG_Ref =
|KEGG = D00346
|KEGG2_Ref =
|KEGG2 = C07054
|ChEBI_Ref =
|ChEBI = 6030
|ChEMBL_Ref =
|ChEMBL = 64
|NIAID_ChemDB = 007657
|IUPAC_name = Pyridine-4-carbohydrazide
|C=6 | H=7 | N=3 | O=1
|SMILES = C1=CN=CC=C1C(=O)NN
|StdInChI_Ref =
|StdInChI = 1S/C6H7N3O/c7-9-6(10)5-1-3-8-4-2-5/h1-4H,7H2,(H,9,10)
|StdInChIKey_Ref =
|StdInChIKey = QRXWMOHMRWLFEY-UHFFFAOYSA-N
}}
Isoniazid, also known as
isonicotinic acid hydrazide (
INH), is an
antibiotic used for the
treatment of tuberculosis. For active tuberculosis, it is often used together with
rifampicin,
pyrazinamide, and either
streptomycin or
ethambutol. For latent tuberculosis, it is often used alone. It may also be used for
atypical types of mycobacteria, such as ''
M. avium'', ''
M. kansasii'', and ''
M. xenopi''. It is usually taken by mouth, but may be used by
injection into muscle.
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