Gastric Acid Disorders + Ulceration Flashcards

1
Q

what is dyspepsia

A

indigestion

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2
Q

symptoms of dyspepsia

A
  • upper abdominal pain
  • heartburn
  • gastric reflux
  • bloating
  • N+V
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3
Q

red flags / urgent referral symptoms of dyspepsia

A
  • GI bleeding
  • 55+
  • unexplained weight loss
  • dysphagia
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4
Q

uninvestigated dypepsia tx

A
  • PPI for 1st 4 weeks
  • test for H.pylori if PPI didn’t work
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5
Q

investigated but no cause present

functional dyspepsia

recurrent

A
  • test for h.pylori
  • not infected = 3 weeks of PPI or H2 receptor antagonist
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6
Q

what is most common cause of peptic uclers

A

h.pylori

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7
Q

how is H.pylori diagnosed

A
  • with urea (13C) breath test or Stool Helicobacter Antigen Test (SAT)
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8
Q

what should be stopped before testing for h.plyori

A
  • PPI stopped 2 weeks before
  • antibiotics 4 weeks before
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9
Q

tx of h.pylori

A
  • PPI = BD
  • Amoxicillin = 1000mg BD
  • Clarithromycin = 500mg BD
  • Metronidazole = 400mg BD
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10
Q

Duration of H.pylori tx

A

7 days

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11
Q

Gastro-Oseophageal Reflux Disease

urgent / red flags of GORD

A
  • GI bleeding
  • 55+
  • unexplained weight loss
  • dysphagia
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12
Q

what increases GORD symptoms

A
  • fatty foods
  • pregnancy
  • hiatus hernia
  • family history
  • stress, anxiety
  • obesity
  • medication s/e
  • smoking + alcohol

hiatus hernia = part of stomach moves to chest

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13
Q

which medications increases GORD as a s/e

A
  • ablocker
  • bblocker
  • CCB
  • anticholingeric
  • benzo
  • bisphosphates
  • corticosteroids
  • NSAIDs
  • nitrates
  • TCA
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14
Q

GORD 1st line

offer lifestyle advice first

A
  • healthy eating
  • weight loss (obese)
  • avoid triggering food
  • smaller meals
  • evening meals 3-4hr before sleep
  • raising head of bed
  • smoking cessation
  • less alcohol consumption
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15
Q

uninvestigated + confirmed GORD

tx of GORD

A
  • medication review if taking exacerbating drugs
  • uninvestigated GORD = 4WK PPI + test for h.pylori
  • confirmed GORD = 4-8WK of PPI
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16
Q

GORD + Pregnancy tx

A

-lifestyle + dietary
-antacid / alginate
-omeprazole or ranitidine

17
Q

what are the different types of antacids and what does it cause

A
  • mg containing (diarrhoea)
  • aluminium containg (constipation)
  • calcium containing (induces rebound acid secretion)
18
Q

what is added to antacids and why

A

simeticone (antifoaming agent) to relieve flatulence

19
Q

how does alignates and antacids works

A
  • increases viscosity of stomach content
  • forms viscous gel (raft) that floats on surface of stomach content
20
Q

interactions of antacids

A
  • increases pH of stomach (more alkali) which damages enteric coated capsules before reaching intestine
  • check Na content of antacid - interacts with Lithium in hypertension
  • do not take with other drugs = impair absorption e.g. bisphosphonates, tetracyclines or ciprofloxacin
21
Q

which antacid contains low sodium

A

co-magaldrox

22
Q

examples of PPI

A
  • omeprazole
  • esomeprazole
  • lansoprazole
  • rabeprazole
23
Q

PPI MHRA warning

A

low risk of subacute cutaneous lupus erythematosus

24
Q

PPI risks

A
  • increases risk of factures/oestoprosis = due to hypomagnaesmia
  • high risk of c.diff
  • masks symptoms of gastric cancer
25
Q

interactions of PPI

A
  • esomeprazole and clopidogrel (use lansoprazole)
  • increases concentration of methotrexate, phenytoin, warfarin + digoxin
26
Q

examples of H2 receptor antagonist

A
  • ranitadine
  • cimetidine (cyp450 inhibitor)
  • famotidine
  • nizatidine
27
Q

risk of H2 receptor antagonists

A
  • may mask gastric cancer symptoms
  • rule out symptoms of cancer before tx
28
Q

s/e of H2 receptor antagonists

A
  • diarrhoea
  • headaches
  • dizziness
  • rash
  • tiredness
29
Q

interactions of H2 receptor antagonists

A
  • reduces absorption of -azole antifungals
  • cimetidine = CYP450 enzyme inhibitor