Sulfasalazine: Brands, Price & Uses in Bangladesh

Sulfasalazine is a sulfonamide-salicylate compound with established and guideline-supported uses in the following conditions:

FDA-approved / Established Uses

• Ulcerative colitis — for the treatment of mild to moderate disease and as adjunctive therapy in severe disease, and for prolonging the remission period between acute attacks.
• Rheumatoid arthritis (RA) — as a disease-modifying antirheumatic drug (DMARD) for adult patients with active RA who have responded inadequately to salicylates or other NSAIDs.

Guideline-Supported / Commonly Used Off-Label Uses

• Crohn's disease — used, particularly the colonic form, though evidence is less robust than for ulcerative colitis; typically used off-label based on clinical guidelines.
• Juvenile idiopathic arthritis (polyarticular course) — used as a second-line DMARD in pediatric patients under specialist supervision.
• Ankylosing spondylitis and other spondyloarthropathies — used off-label, particularly for peripheral joint involvement, based on rheumatology guideline support.
• Psoriatic arthritis — used off-label as a DMARD option in some patients.

Use of Sulfasalazine should be initiated and monitored by a physician experienced in managing these conditions.

Ulcerative Colitis (Adults)

Initial: 3–4 g/day in divided doses (with plain tablets, often started at 1–2 g/day and increased gradually to reduce GI intolerance). Maintenance: 2 g/day in divided doses.

Ulcerative Colitis (Pediatric, ≥6 years)

Initial: 40–60 mg/kg/day in 3–6 divided doses; Maintenance: 20–30 mg/kg/day in 4 divided doses, not to exceed the adult dose.

Rheumatoid Arthritis (Adults)

Enteric-coated tablets are generally preferred. Initial: 0.5–1 g/day, increased gradually (e.g., by 0.5 g/week) up to a maintenance dose of 2 g/day (occasionally up to 3 g/day) in divided doses.

Juvenile Idiopathic Arthritis (≥6 years)

Enteric-coated tablets: approximately 30–50 mg/kg/day in 2 divided doses, not to exceed 2 g/day, under specialist supervision.

Administration

Take with plenty of water, preferably after meals, to reduce gastrointestinal upset. Enteric-coated tablets should be swallowed whole and not crushed or chewed. Doses are usually increased gradually to improve tolerability. Sulfasalazine should be taken exactly as prescribed by a physician; do not stop, skip, or alter the dose without medical advice, and periodic blood tests are required during therapy (see Precautions).

Renal/Hepatic Impairment

Use with caution and reduced dose in patients with renal or hepatic impairment; such patients require closer monitoring, as sulfapyridine and its metabolites are renally excreted.

Common side effects include nausea, vomiting, anorexia, headache, and reversible orange-yellow discoloration of urine, skin, or contact lenses (harmless).

Less common but clinically important effects include:

• Hematologic: leukopenia, agranulocytosis, thrombocytopenia, aplastic anemia, and hemolytic anemia (particularly in patients with G6PD deficiency) — these require periodic blood monitoring (see Precautions).
• Hepatic: elevated liver enzymes, hepatitis (rare).
• Dermatologic: rash, photosensitivity, and rare but serious reactions such as Stevens-Johnson syndrome or toxic epidermal necrolysis.
• Renal: crystalluria, proteinuria (rare nephrotic syndrome).
• Reproductive: reversible oligospermia and infertility in men, which resolves after discontinuation.
• Hypersensitivity/serum-sickness-like reactions: fever, rash, lymphadenopathy (DRESS syndrome has been reported rarely).

Patients should seek prompt medical attention for fever, sore throat, unusual bruising/bleeding, jaundice, or severe skin rash while taking Sulfasalazine.