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Irritable Bowel Syndrome (IBS) Symptoms Treatment
Irritable Bowel Syndrome (IBS)
Irritable Bowel Syndrome (IBs) is a gastrointestinal disorder without any structural pathology, characterized by pain in abdomen, and constipation and diarrhea.
- Irritable bowel syndrome (IBS) is a gastrointestinal syndrome characterized by chronic abdominal pain and altered bowel habits in the absence of any organic cause.
- May be characterized as diarrhea-predominant or constipation-predominant; or may alternate between diarrhea and constipation.
- Synonym(s): Spastic colon; Irritable colon
- A condition marked by abdominal pain (often relieved by the passage of stool or gas); disturbances of evacuation (constipation, diarrhea, or alternating episodes of both); bloating and abdominal distention; and the passage of mucus in stools.
Rome II Criteria for Diagnosis of IBS
- Patient should have 12 weeks of abdominal pain in the past 12 months.
- Pain is relieved by defecation (passing stools). Onset of disease (pain) is with decrease in stool frequency and form.
- May be characterized as diarrhea-predominant or constipation-predominant;
- or may alternate between diarrhea and constipation.
- Synonym(s): Spastic colon; Irritable colon
Clinical Features Symptoms OF IBS —
- · Occurs in’ young patients <45 years. May occur in middle aged and elderly.
- · More common,in women.
- · There is abdominal pain and constipation, diarrhea, or both.
- · Diarrhea is usually painless.
- · Pain occurs in hypogastrium, right side, left side, or in the epigastrium.
- · It may be cramp-like or mild.
- Mucus in stools
- Constipation
- Bloating
- Diarrhea
- Abdominal distention
- May be characterized as diarrhea-predominant or constipation-predominant;
- or may alternate between diarrhea and constipation.
- Synonym(s): Spastic colon; Irritable colon
- · There is no malnutrition.
- · Pain occurs during waking hours.
- · Pain is increased by eating and emotional stress.
- · Pain is relieved by passage of stools.
- · Pain may be related with menstruation in women.
- · Constipation may be continuous and painful.
Other Symptoms of IBS —
- Feelings of incomplete evacuation
- Abnormal stool form
- Nausea, vomiting (rarely)
- · Stools are hard.
- · In patients with diarrhea, stool is small in quantity.
- There may be mucus in stools so it is also called mucus colitis.
- There is no bleeding or malabsorption.
- There is abdominal distension and flatulence due to gas.
- There is belching, heart burn, nausea, vomiting, dyspepsia.
- IBS exists with other functional disorders like non-cardiac chest pain.
- IBS has a strong relationship with stress and emotional upsets.
Risk Factors
- Other family members with similar GI disorder
- History of childhood sexual abuse
- Sexual or domestic abuse in women
- Depression
- Can occur after an infectious colitis
Imaging
- Abdominal CT scan or abdominal ultrasound to evaluate pain is generally normal.
- Small-bowel series or video capsule endoscopy to rule out Crohn disease of small intestine may be considered, and will also be normal.
- Sitzmarker study may be used to evaluate colon transit in patients with constipation.
Lab Findings
- Diarrhea-predominant: ESR, CBC, tissue transglutaminase, TSH, and stool for ova and parasites
- Constipation-predominant: CBC, TSH, electrolytes
- Abdominal pain: LFTs and amylase
IBS Treatment
- Reassurance
- Irritable Bowel Syndrome (IBS) TREATMENT
- Avoid coffee, legumes (peas), cabbage and any food which causes symptoms.
- High-fiber diet like bran is good for both constipation and diarrhea.
- Fiber is given as psyllium.
- Antispasmodics – anticholinergic drugs to relieve pain is given 30 minutes before meals.
- Belladonna alkaloids, dicyclomine, are used as antispasmodics.
- Antidiarrheal agents – codine, diphenoxylate. Antidepressants – paroxetine, citalopram, tricydie antidrepressants like desipramine.
- Antiflatulents – Simethicone, antacids, activated charcoal.
- Avoid chewing gum? carbonated drinks, artificial sweeteners, cabbage, peas.
- Serotonin-receptor antagonists.
List of drugs used in IBS for various abdominal disorders —
Symptom | Drug | Dose |
Diarrhea | Loperamide | 2–4 mg when necessary/maximum 12 g/d |
Cholestyramine resin | 4 g with meals | |
Constipation | Psyllium husk | 3–4 g bid with meals, then adjust |
Methylcellulose | 2 g bid with meals, then adjust | |
Calcium polycarbophil | 1 g qd to qid | |
Lactulose syrup | 10–20 g bid | |
70% sorbitol | 15 mL bid | |
Polyethylene glycol 3350 | 17 g in 250 mL water qd | |
Lubiprostone (Amitiza) | 24 mg bid | |
Magnesium hydroxide | 30–60 mL qd | |
Abdominal pain | Smooth-muscle relaxant | qd to qid ac |
Tricyclic antidepressants | Start 25–50 mg hs, then adjust | |
Selective serotonin reuptake inhibitors | Begin small dose, increase as needed |