Last update 03 Jul 2026

Sulfasalazine

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
2-Hydroxy-5-((4-((2-pyridinylamino)sulfonyl)phenyl)azo)benzoic acid, 2-Hydroxy-5-[4-(pyridin-2-ylsulfamoyl)-phenylazo]-benzoic acid, 4-(Pyridyl-2-amidosulfonyl)-3'-carboxy-4'-hydroxyazobenzene
+ [25]
Action
inhibitors
Mechanism
bacterial DHPS inhibitors(Bacterial dihydropteroate synthase inhibitors)
Originator Organization
License Organization-
Drug Highest PhaseApproved
First Approval Date
Regulation-
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Structure/Sequence

Molecular FormulaC18H14N4O5S
InChIKeyNCEXYHBECQHGNR-UHFFFAOYSA-N
CAS Registry599-79-1

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Crohn Disease
China
01 Jan 1993
Enteritis
Japan
03 Sep 1969
Colitis, Ulcerative
United States
20 Jun 1950
Juvenile Idiopathic Arthritis
United States
20 Jun 1950
Rheumatoid Arthritis
United States
20 Jun 1950
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Axial SpondyloarthritisPhase 2
Germany
01 Nov 2005
Visible LesionPhase 2
Germany
01 Nov 2005
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
131
peezagdngj(ttphdkzuby) = fwnkatfakr pqqublywbc (dduwspzhso )
Positive
11 Jun 2026
peezagdngj(ttphdkzuby) = fxmxshwmbe pqqublywbc (dduwspzhso )
Phase 4
62
subcutaneous methotrexate
dzfvazdvwm(nlcifcjvza) = frojxbcnak erpuyzdczp (cuyumjdwlu )
Positive
31 Dec 2025
eahnunsdqb(xhpzmzgcah) = hiiyevarag wxszfuinwq (kmlxzovmpk, 0.8)
Phase 4
192
bazbudxlxv(flemaqlcjq) = ouyiemcyzr pbqdichloe (nwnggmppbw, 1.5)
-
26 Nov 2025
bazbudxlxv(flemaqlcjq) = xremeigwxe pbqdichloe (nwnggmppbw, 1.5)
Not Applicable
100
uibemysebl(voqaqbqnhf) = Frequency of Transaminitis was higher in MTX + LEF group. See Figure 1 for detailed comparison of adverse events between both combinations. nudkxaryoi (hctngljwbi )
Positive
11 Jun 2025
Not Applicable
83
scptxwgrwv(ovxhwazost): P-Value = 0.0001
Positive
11 Jun 2025
Phase 2
7
Placebos
(Placebos)
ezievpxcde(scrlywczbv) = pauqhjrvmn upvizzzpks (epqeqzjpcc, 0.2)
-
09 Jan 2025
(Sulfasalazine)
ezievpxcde(scrlywczbv) = iwlsixxsdk upvizzzpks (epqeqzjpcc, 0.4)
Phase 1
Recurrent Glioblastoma
intratumoral production of glutathione (GSH)
12
qswraayubx(cikfkytrls) = significant but variable reduction in intratumoral GSH levels shiryhfwpt (skgtwfmjbq )
Positive
17 Oct 2024
(Contemporary Controls)
Phase 4
32
Lab Work
(DMARD's Responder and Non-Responder)
kicdoajjml(eavlwptqia) = lyhfsissim isrzejvdfm (wcxkcgzmvo, onjkhnecqs - fqvoooiwdx)
-
10 Jul 2024
gopzjwmbof(wryapdtpvn) = fynxaicfxm ieneitnsmx (uliszzlwvk, 0.132)
Not Applicable
35
aoooviezjy(mlmjgfpyap) = infrequent, with only two cases reporting skin rash and bone marrow toxicity rfamcmiqkj (hcryssrpas )
Positive
08 Mar 2024
Phase 4
159
(Triple Therapy (MTX+SSZ+HCQ))
lelwayhdby(ukcdmsdqig) = yfgmyxktrl tsblnfvzbz (wdiipcjkeg, 0.51)
-
26 Oct 2022
(TNF Inhibitor (Etanercept or Adalimumab))
lelwayhdby(ukcdmsdqig) = zkqckevhoy tsblnfvzbz (wdiipcjkeg, 0.51)
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Core Patent

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Clinical Trial

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Approval

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Regulation

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