Heartburn and Dyspepsia Flashcards

1
Q

Definitions - Symptoms

A

• Heartburn (“pyrosis”)

  • Burning sensation of stomach or lower chest that rises up toward the neck and occasionally to the back
  • Described as indigestion, acid regurgitation, sour stomach, or bitter belching

• Dyspepsia
- Symptoms originate from gastroduodenal region
- Bothersome postprandial fullness, early satiation, epigastric pain, and epigastric burning
• +/- anorexia, belching, NV, upper abdominal bloating

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2
Q

Disorders

A

• Gastroesophageal reflux disease (GERD)
- Sx: heartburn (common), dysphagia, odynophagia, globus sensation, hypersalivation, and regurgitation
• +/- esophageal damage resulting from reflux of acidic gastric contents into esophagus

  • Peptic ulcer disease (PUD)
    • Ulcers in the stomach/duodenum
    • Dyspepsia can be a symptom
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3
Q

Dietary Risk Factors

A
  • Alcohol
  • Caffeinated beverages
  • Carbonated beverages
  • Chocolate
  • Citrus fruits or juices
  • Coffee
  • Fatty foods
  • Garlic or onions
  • Mint (spearmint/peppermint)
  • Spicy foods
  • Sugars
  • Tomatoes/tomato juice
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4
Q

Other Risk Factors

A
- Lifestyle
• Emotions (anxiety, fear, worry)
• Exercise (isometric, running)
• Obesity
• Smoking tobacco
• Stress
• Supine body position
• Tight-fitting clothing
  • Diseases
    • Insulin resistance (pre-diabetes, diabetes, PCOS)
    • Motility disorders (gastroparesis)
    • PUD
    • Scleroderma, Sjogren disease, Zollinger-Ellison syndrome
  • Pregnancy
  • Genetics
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5
Q

Medications That May Cause Heartburn

A
Main
• Aspirin/NSAIDs
• Bisphosphonates
• Iron
• Potassium
Also
• Alpha blockers
• Benzodiazepines
• Beta agonists
• Calcium channel blockers
• Opioid analgesics
• Oral contraceptives
• Doxycyline
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6
Q

Pathophysiology/Etiology of Dyspepsia

A
  • PUD
  • GERD
  • Celiac disease
  • Gastric or esophageal cancer
  • Motility disorders
  • Medications: NSAIDs, iron, antibiotics, opioids, digoxin, estrogens, theophylline
  • Visceral hypersensitivity
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7
Q

Clinical Presentation: Heartburn

A
  • Alone or as a symptom of GERD (2x/week is indicative) or PUD
  • Within 1 hr of especially large meal or offending foods/beverages
  • Lying down or bending over may exacerbate
  • ≥2 times/week suggests GERD
  • Regurgitation and water brash may also occur
  • Generally classified as mild or moderate
  • Mild - somewhat bothersome, doesn’t interfere with normal activities
  • Moderate - bothersome sx that interfere with normal activities
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8
Q

Clinical Presentation: Dyspepsia

A
  • Postprandial fullness
  • Early satiation
  • Epigastric pain
  • Epigastric burning
- Less specific: 
• Bloating
• Nausea
• Belching 
• Vomiting
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9
Q

Alarm Symptoms

A
  • Dysphagia
  • Odynophagia
  • Upper GI bleeding (hematemesis, melena, occult bleeding, anemia)
  • Unexplained weight loss
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10
Q

Heartburn: Exclusions for Self-Treatment

A
  • Frequent >3 months
  • While on OTC H2RAs or PPIs
  • Continuing after 2 weeks of OTC H2RA or PPI
  • When taking RX H2RA or PPI
  • Severe heartburn or dyspepsia
  • Nocturnal heartburn
  • Difficulty or pain swallowing solid foods
  • Vomiting blood/black material or passing black tarry stools
  • Chronic hoarseness, wheezing, coughing, or choking
  • Unexplained weight loss
  • Continuous N/V/D
  • Chest pain + sweating, pain radiating to shoulder, arm, neck, or jaw, shortness of breath
  • Children <2 y.o. [for antacids], <12 y.o. [for H2RAs], and <18 y.o. [for PPIs]
  • Adults >45 y.o. with new-onset dyspepsia
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11
Q

Non-pharmacologic Therapy

A
  • Diary to track dietary, lifestyle, and med triggers; then avoid those triggers
  • Weight loss if overweight
  • Elevate head of the bed 6-8 inches or use foam wedge (GERD pillow)
  • Avoid tobacco products
  • Dietary interventions
  • Eat smaller meals
  • Refrain from eating within 2-3 hours of lying down and sleep on left side
  • Limit/discontinue alcohol or caffeine
  • Plant-based Mediterranean diet and alkaline water (pH ≥8)
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12
Q

Pharmacologic Therapy

A
  1. Antacids
  2. Histamine type 2 receptor antagonists (H2RAs)
  3. Proton pump inhibitors (PPIs)
  4. Bismuth subsalicylate
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13
Q

Antacids: MoA

A
  • Neutralize gastric acid; act as buffering agents in GI tract (pH >5, stop pepsinogen -> pepsin, increase LES pressure)
  • FOR: Temporary and rapid relief of mild, infrequent heartburn
  • Contain one of the following salts (all interchangeable):
    • Magnesium (hydroxide, carbonate, or trisilicate)
    • Aluminum (hydroxide or phosphate)
    • Calcium carbonate
    • Sodium bicarbonate
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14
Q

Antacids: Avoid If…

A

• Avoid antacid-aspirin combination products due to risk of serious bleed, especially in following patients:

  • ≥60 years old
  • History of stomach ulcers or bleeding problems
  • Using anticoagulants, systemic steroids, or NSAIDs
  • Consume ≥3 alcoholic beverages daily
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15
Q

Antacids: AEs,

A
  • Mg2+ → diarrhea (avoid if CrCl <30 mL/min d/t toxicity)
  • Al → constipation, hypophosphatemia (avoid if CrCl <30 mL/min)
  • Ca2+ → belching and flatulence, constipation

• NaHCO3 → belching and flatulence
- Avoid in renal failure, HF, cirrhosis, pregnancy, and sodium-restricted diets

• If taking calcium supplement

  • Avoid Ca2+ and NaHCO3 antacids
  • Avoid Ca2+ antacid in renal failure
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16
Q

Antacids: Counseling

A
  • Use product-specific doses, repeat in 1-2 hours if needed
  • Food slows absorption (longer relief with food)
  • Chew tablets well and drink 8 oz water
  • Do not use >2x/week or >2 weeks
  • May increase or decrease absorption other medications
  • Separate by 1 hour: isoniazid
  • Separate by 2 hours: Amphetamines, Azithromycin, Enteric-coated products, Iron, Itraconazole, ketoconazole
  • Separate by 4 hours: tetracyclines and levothyroxine
  • Take 2 hours before or 6 hrs after antacid: fluoroquinolones
17
Q

H2RAs: MoA

A

•MoA

  • Decrease fasting / food-stimulated gastric acid secretion and gastric volume by inhibiting histamine on the histamine type 2 receptor of the parietal cell
  • Effective in relieving fasting and nocturnal symptoms

• FOR: mild-moderate, infrequent, or episodic heartburn and for prevention of heartburn associated with acid indigestion and dyspepsia

18
Q

H2RAs: Info

A
  • Not effected by food
    • Relief not as rapid as antacids but duration is longer
    • Lower dosages for mild, infrequent HB / higher dosages for moderate

• Reduce dose if impaired RENAL function (half dose in CrCl <50 mL/min) and in elderly

  • Take at onset of sx or 30-60 min prior to anticipated heartburn, no more than 2x/day
  • Tolerance may develop if taken daily (vs PRN)
19
Q

H2RAs: Brands

A
  • Tagament HB, Cimetidine 200 mg
  • Pepcid AC/Zantac 360, Famotidine 10 mg
  • Pepcid MAX, Zantac MAX, Famotidine 20 mg

^ ALL 1 tab with water, max 2 tabs

  • Pepcid Complete/Tums: Famotidine + Ca carb + mag OH (chew 1 tab, max 2)
20
Q

H2RAs: AEs, Interactions

A

• Adverse effects

  • Headache, diarrhea, constipation, dizziness, drowsiness
  • Thrombocytopenia is rare (and reversible)
  • Cimetidine has weak anti-androgenic effects

• Drug interactions

  • Cimetidine has many!!! Increases concentration of nifedipine (CCB) - monitor
  • May decrease absorption of pH-dependent drugs: itraconazole, ketonazole, iron sulfate, calcium carbonate
21
Q

PPIs: MoA

A

• MoA

  • Inhibit H+/K+ ATPase (proton pump)
  • Irreversibly block the final step in gastric secretion, thus providing a greater prolonged and potent effect
  • Indicated for frequent heartburn with symptoms ≥2 days/week or when not responding to non-rx H2RAs
  • Not intended for immediate relief or occasional and acute episodes of heartburn and dyspepsia
22
Q

PPIs: Info

A
  • Onset: 2-3 hours, may take 1-4 days for complete relief
  • Do not chew or crush tablets/capsules
  • Only inhibit proton pumps that actively secrete acid so most effective 30-60 min before meal (preferably before breakfast)
  • Limit to 14 days of use, no more than every 4 months
23
Q

PPIS: Brands

A
  • Prilosec: Omeprazole
  • Zegerid: Omeprazole + NaBiCarb
  • Prevacid: Lansoprazole
  • Nexium: Esomeprazole

^ ALL 1 tab max, 30 min before bfast

24
Q

PPIs: AEs

A
  • Uncommon but may include diarrhea, constipation, headache
  • Rebound acid reflux upon abruptly discontinuing after long term use
  • May increase risk of traveler’s diarrhea by altering glut flora
25
Q

PPIs: Drug Interactions

A

• Omeprazole and esomeprazole
- May inhibit metabolism of clopidogrel via CYP 2C19 (check provider)

  • May inhibit metabolism resulting in increased concentration of cilostazol and diazepam
    • Avoid concurrent use
    • Lansoprazole may be a safer alternative
26
Q

Bismuth Subsalicylate (BSS)

A
  • Indicated for heartburn, dyspepsia, indigestion, nausea, and diarrhea
  • FDA approved for upset stomach (belching, gas) due to overindulgence in food and drink
  • Topical effect on stomach mucosa
  • Adult dose: 262-525 mg every 30-60 minutes as needed
  • Not recommended for children or patients with renal failure or salicylate sensitivities
  • May turn stool and/or tongue black
27
Q

How to Select a Product

A

• Caution with elderly
- Avoid cimetidine; avoid H2RAs in those with or at high risk for delirium

• Caution with renally-impaired

  • Avoid magnesium and aluminum antacids
  • Avoid cimetidine; use low doses of other H2RAs
  • Select antacid partly based on potential side effects
  • Children >2 y.o. can use children’s formulas of calcium carbonate antacids
  • Pregnancy
  • Infrequent, mild heartburn: diet, lifestyle interventions
  • Calcium and magnesium antacids ok (max 1000-1300 mg/day calcium)
  • H2RAs are ok; PPIs likely ok but limited evidence (refer for moderate heartburn)

• Breast-feeding
- Aluminum, calcium, or magnesium antacids safe
- Famotidine>cimetidine
• Avoid PPIs