Sulfasalazine - Sulfasalazine Ulcerative Colitis

- Agustus 15, 2017

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Sulfasalazine (SSZ), sold under the trade name Azulfidine among others, is a medication used to treat rheumatoid arthritis, ulcerative colitis, and Crohn's disease. It is often considered as a first line treatment in rheumatoid arthritis. It is taken by mouth.

Significant side effects occur in about 25% of people. Commonly these include loss of appetite, nausea, headache, and rash. Severe side effects include bone marrow suppression, liver problems, and kidney problems. It should not be used in people allergic to aspirin or sulfonamide. Use during pregnancy appears to be safe for the baby. Sulfasalazine is in the disease-modifying antirheumatic drugs (DMARDs) family of medications. It is unclear exactly how it works but is broken down into sulfapyridine and 5-aminosalicylic acid.

Sulfasalazine was approved for medical use in the United States in 1950. It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system. Sulfasalazine is available as a generic medication. The wholesale cost in the developing world is about 9.24 to 32.64 USD a month. In the United States it costs 25 to 50 USD per month.


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Medical uses

Sulfasalazine is used in the treatment of inflammatory bowel disease, including ulcerative colitis and Crohn's disease. It is also indicated for use in rheumatoid arthritis and used in other types of inflammatory arthritis (e.g. psoriatic arthritis).

It is usually not given to children under 2 years of age.


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Side effects

Sulfasalazine metabolizes to sulfapyridine. Serum levels should be monitored every three months, and more frequently at the outset. Serum levels above 50 ?g/l are associated with side effects. In rare cases, Sulfasalazine can cause severe depression in young males. It can also cause temporary infertility. Immune thrombocytopenia has been reported.

Sulfasalazine inhibits dihydropteroate synthase, and can cause folate deficiency and megaloblastic anemia. and various other undesirable effects.

Sulfasalazine can cause hemolytic anemia in people with G6PD deficiency.

Sulfasalazine may cause stomach upset, nausea, vomiting, loss of appetite, headache, dizziness, or unusual tiredness. Skin and urine can become orange, with occasional allergic reactions.


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Pharmacology

Around 90% of a dose of sulfasalazine reaches the colon, where most of it is metabolized by bacteria into sulfapyridine and mesalazine (also known as 5-aminosalicylic acid or 5-ASA). Both metabolites are active; most of the sulfapyridine is absorbed and then further metabolized, but most mesalazine is not, and remains in the colon.

A mix of unchanged, hydroxylated, and glucuronidated sulfapyridine is eliminated in urine, as is acetylated mesalazine and unmetabolized sulfasalazine.

The mechanism of action is not clear, but it appears that sulfasalazine and its metabolites have immunosuppressive, antibacterial, and anti-inflammatory effects. It also appears to inhibit the cystine-glutamate antiporter.


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Research

Sulfasalazine has been studied in cirrhosis and idiopathic urticaria.

Source of the article : Wikipedia



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