Irritiable bowel diseases Flashcards
What are the primary aims of IBD management?
- To induce and maintain remission (either clinical or endoscopic)
- Reduce the risk of complications
- Improve patient quality of life
What are the symptoms of Crohn’s relapse?
Weight loss, abdominal pain, diarrhoea and general ill-health.
Ulcerative Colitis vs Crohn’s?
Location
Symptoms
What are the criteria for UC to be labelled as Acute severe ulcerative colitis (ASUC)?
Defined by the modified Truelove and Witts criteria as:
* >6 bloody stools per day and systemic toxicity with at least one of:
* Temperature >37.8°C
* Pulse >90 bpm
* Haemoglobin <105 g/L
* C-reactive protein >30 mg/L
Adult patients with ASUC or adolescents with a Paediatric Ulcerative Colitis Activity Index (PUCAI) score of 65 or more should be admitted to hospital for assessment and intensive management
IBD affects how many people in the UK?
400 people per 100,000
What are the main drugs used in IBD?
- Aminosalicylates (mesalazine, sulfasalazine)
- Corticosteroids (such as prednisolone, beclomethasone and budesonide)
- Thiopurines (azathioprine, mercaptopurine)
What are aminosalicylates? How do they work?
5-aminosalicylic acid (5-ASA) class of drugs (mesalazine and sulphasalazine) are considered safe and effective long-term treatment options for IBD
The mechanism of action of 5-ASAs is not well understood; however, they are thought to reduce inflammation by inhibiting release of interleukin-1 and preventing recruitment of leucocytes into the bowel wall
What are the main side effects of aminosalicylates?
Renal complications, drug-induced liver injury, dyspepsia, rash, urticaria and eosinophilia
Treatment of acute mild-moderate EXTENSIVE ulcerative colitis?
- Topical aminosalicylate + high dose oral aminosalicylate (Topical + Oral)
Studies have shown that a combination of high-dose oral and rectal mesalazine therapy is more effective at inducing remission of mild-to-moderate symptoms compared with oral therapy alone.
No improvement after 4 weeks:
- High dose oral aminosalicylate + 4-8 weeks oral corticosteroid (Oral + Oral)
If aminosalicylates contraindicated: 4-8 weeks oral corticosteroid
Maintenance treatment of mild-moderate ulcerative colitis?
Once in remission, 5-ASA therapy for UC should be reduced to a maintenance dose as appropriate, to limit adverse effects but still reduce the risk and frequency of flares
Ideally, all UC patients should be offered a combination of oral and enema 5-ASA
In mild-to-moderate UC, 5-ASAs are the treatment of choice and all patients should be offered a 5-ASA at a dose of 2.0-3.0g/day orally. Patients experiencing flare-ups can be escalated to 4.0–4.8 g/day
Methotrexate has no role in the maintenance of remission in UC.
True or False?
True
What are the monitoring and reporting requirements for Aminosalicylates?
Monitoring: Renal function before starting, 3 months later and then annually
Blood dyscrasias - sore throat, fever, rash, ulcers, bleeding - refer to A+E
Good practice to prescribe by brand name but not legal requirement
Sulfasalazine discolours bodily fluids what colour?
Colours body fluids orange/yellow (not harmful, avoid wearing contact lenses)
Treatment with 5-ASAs is not recommended for induction or maintenance treatment of Crohn’s Disease.
True or False?
True
Can be used if Crohn’s is mild and the patient cannot have, or decide not to have, steroids.
What is first-line treatment for patients with a mild-to-moderate initial presentation or inflammatory exacerbation of proctitis? (present in both UC and CD)
What would be second and third line?
- Rectal + oral aminosalicylates (if mild, rectal mesalazine may suffice)
- Foam if have difficulty retaining liquid from enemas)
If no improvement after 4 weeks or patient does not want to use rectal formulations:
- Oral aminosalicylate
- Rectal or oral steroid for 4-8 weeks
What can be used for maintenance of proctitis/proctosigmoiditis?
Rectal aminosalicylate can be started alone or in combination with oral aminisalicylate
What is the advantage of the newer aminosalicylates (mesalazine, balsalazide, olsalazine) over sulfasalazine?
Avoids the sulfonamide-related side effects of sulfasalazine
(sulphonamides are CYP inhibitors)
Sulfasalazine is a combination of what two compounds?
5-ASA and sulfapyridine
Sulfapyridine acts only as a carrier to the colonic site of action but still causes side effects
Which aminosalicylates have rectal preparations?
Mesalazine and sulfasalazine
Are corticosteroids suitable for maintenance treatment of UC?
No because of their side effects
What should be given in severe acute UC?
MEDICAL EMERGENCY
- IV corticosteroids (methylpred or hydrocortisone)
- Usually 100mg hydrocortisone QDS - If symptoms not improved after 72 hours:
- IV steroid + IV ciclosporin
- Surgery - Infliximab if cannot use ciclosporin
Step down to oral prednisolone 40mg a day, with an aim to taper over six to eight weeks (usually tapered by 5mg per week)
In patients being treated with aminosalicylates for UC, when would you add in oral prednisolone?
No improvements within 4 weeks of initial therapy. If patient is on beclometasone, discontinue this
What is first line treatment for patients with acute exacerbation mild-moderate proctosigmoiditis or left-sided UC?
- Topical aminosalicylate (Topical)
No improvement after 4 weeks:
- High dose oral aminosalicylate + topical aminosalicylate OR High dose oral aminosalicylate + 4-8 weeks of topical steroid (Topical + Oral)
- High dose oral aminosalicylate + 4-8 weeks of ORAL steroid (Oral + Oral)
What are second generation corticosteroids?
Beclomethasone diproprionate and slow release budesonide
They have high affinity for the intracellular glucocorticoid receptor in the GI tract
- Lower systemic availability owing to extensive pre-systemic metabolism within the mucosa of the small intestine and the liver
- ‘Topically acting’ even though they are taken orally
Ensure the brand is specified as they have slightly different sites of release and licensed indications
Once remission is achieved, these should be tapered over one to two weeks