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Clinical data
AHFS/ Monograph
MedlinePlus a682130
  •  ?
Routes of
Topical cream, by mouth
ATC code J01EC02 (WHO) QJ01EQ10 (WHO)
Legal status
Legal status
  • ℞ (Prescription only)
Pharmacokinetic data
Bioavailability ?
Metabolism ?
Biological half-life ?
Excretion ?
CAS Number 68-35-9 YesY
PubChem (CID) 5215
DrugBank DB00359 N
ChemSpider 5026 N
UNII 0N7609K889 N
KEGG D00587 YesY
ECHA InfoCard 100.000.623
Chemical and physical data
Formula C10H10N4O2S
Molar mass 250.278 g/mol
Melting point 252 to 256 °C (486 to 493 °F)
 NYesY (what is this?)  (verify)

Sulfadiazine is an antibiotic.[1] Used together with pyrimethamine it is the treat of choice for toxoplasmosis.[2] It is a second line treatment for otitis media, prevention of rheumatic fever, chancroid, chlamydia and infections by Haemophilus influenzae. It is taken by mouth.[1]

Common side effects include nausea, diarrhea, headache, fever, rash, depression, and pancreatitis.[1] It should not be used in people who have severe liver problems, kidney problems, or porphyria.[2] If used during pregnancy it may increase the risk of kernicterus in the baby.[1] It is believed to be safe during breastfeeding if the baby is otherwise healthy.[3] It is in the sulfonamide class of medications.[1]

Sulfadiazine was approved for medical use in the United States in 1941.[1] It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[4] Sulfadiazine is available as a generic medication.[1] The wholesale cost in the developing world is about 2.70 to 7.32 USD a month.[5] In the United States treatment costs more than 200 USD a month.[6]

Medical uses[edit]

It eliminates bacteria that cause infections by stopping the production of folate inside the bacterial cell, and is commonly used to treat urinary tract infections, and burns.

In combination, sulfadiazine and pyrimethamine, can be used to treat toxoplasmosis, a disease caused by Toxoplasma gondii.

Mechanism of action[edit]

Sulfadiazine works by inhibiting the enzyme dihydropteroate synthetase. In combination with pyrimethamine (a dihydrofolate reductase inhibitor), sulfadiazine is used to treat active toxoplasmosis.

Side effects[edit]

Side effects reported for sulfadiazine include: nausea, upset stomach, loss of appetite, and dizziness.

Brand names[edit]

Lantrisul; Neotrizine; Sulfa-Triple #2; Sulfadiazine; Sulfaloid; Sulfonamides Duplex; Sulfose; Terfonyl; Triple Sulfa; Triple Sulfas; Triple Sulfoid

See also[edit]


  1. ^ a b c d e f g "Sulfadiazine". The American Society of Health-System Pharmacists. Retrieved 8 December 2016. 
  2. ^ a b WHO Model Formulary 2008 (PDF). World Health Organization. 2009. pp. 126, 205. ISBN 9789241547659. Retrieved 8 December 2016. 
  3. ^ "Sulfadiazine Use During Pregnancy |". Retrieved 9 December 2016. 
  4. ^ "WHO Model List of Essential Medicines (19th List)" (PDF). World Health Organization. April 2015. Retrieved 8 December 2016. 
  5. ^ "Sulfadiazine". International Drug Price Indicator Guide. Retrieved 8 December 2016. 
  6. ^ Hamilton, Richart (2015). Tarascon Pocket Pharmacopoeia 2015 Deluxe Lab-Coat Edition. Jones & Bartlett Learning. p. 104. ISBN 9781284057560.