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Drugs for Treatment of Ulcerative Colitis in IBD

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Ulcerative colitis is a chronic inflammatory condition primarily affecting the colon and rectum. The primary drugs used in the treatment of ulcerative colitis are aminosalicylates. They exhibit anti-inflammatory and immunosuppressive properties. They modulate inflammatory mediators and inhibit the activity of nuclear factor κB (NF-κB). Aminosalicylates also reduce inflammation by inhibiting prostaglandin and leukotriene production and decreasing neutrophil chemotaxis and superoxide...
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Glucocorticoids, a class of anti-inflammatory drugs, are pivotal in treating moderate to severe Crohn's disease by inducing remission. They exhibit their anti-inflammatory action by inhibiting the production of inflammatory cytokines such as tumor necrosis factor (TNF)-α, interleukin (IL)-1, and chemokines like IL-8. In addition, they reduce the expression of inflammatory cell adhesion molecules and inhibit gene transcription of nitric oxide synthase, phospholipase A2, cyclooxygenase-2...
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Crohn's disease is an inflammatory bowel disorder marked by chronic inflammation of the GI tract. Various treatment strategies for Crohn's disease are employed, such as immunomodulatory agents, glucocorticoids, and biologics or anti-TNF therapy. Azathioprine (Imuran), a commonly used immunomodulatory drug for Crohn's disease, is converted in the body to mercaptopurine, which inhibits purine biosynthesis and cell proliferation. Both are utilized in severe cases of Inflammatory Bowel...
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Ulcerative colitis is a chronic inflammatory disorder of the colon characterized by continuous mucosal inflammation that typically begins in the rectum and extends proximally in a uniform pattern. Its pathogenesis involves a complex interplay of genetic predisposition, immune dysregulation, and environmental influences. These factors converge to impair the colon’s epithelial defenses and promote an exaggerated inflammatory response against luminal contents.Breakdown of the Mucosal...
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Flucytosine-induced colitis.

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An HIV patient with cryptococcal meningitis developed severe diarrhea due to flucytosine treatment. Stopping the medication resolved the colitis, highlighting a potential adverse effect of flucytosine in HIV patients.

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Area of Science:

  • Infectious Diseases
  • Pharmacology
  • Gastroenterology

Background:

  • A 52-year-old human immunodeficiency virus (HIV) patient with a low CD4 count (155) and high viral load (154 K) presented with symptoms of cryptococcal meningitis.
  • The patient was initiated on flucytosine as part of the treatment regimen for cryptococcal meningitis.

Observation:

  • Following 10 days of flucytosine therapy, the patient developed acute watery diarrhea.
  • Extensive infectious workup and colonoscopy revealed severe acute colitis, with no other infectious cause identified.

Findings:

  • The patient's diarrhea was attributed to flucytosine, a known potential side effect.
  • Discontinuation of flucytosine led to a significant improvement in the patient's colitis and diarrhea within 5 days.

Implications:

  • This case highlights the importance of considering flucytosine-induced colitis in immunocompromised patients presenting with diarrhea during treatment for cryptococcal infections.
  • Clinicians should monitor for gastrointestinal adverse effects when prescribing flucytosine, particularly in patients with advanced HIV.
  • Early recognition and management of drug-induced colitis can prevent complications and improve patient outcomes.