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9/20/2012 1 Stress Ulcer Prophylaxis Rob Wills, Pharm.D., BCPS Clinical Manager of Pharmacy PGY1 Residency Program Director St. Luke’s Boise-Meridian Medical Centers Disclosure Statement No conflict of interest Objectives Who should be receiving stress ulcer prophylaxis in your institution? Pathophysiology Risk Factors What medications are best to use to prevent stress ulcers? The great debate: PPI’s vs. H2RA’s vs. sucralfate What are the complications of providing stress ulcer prophylaxis? Strategies for gaining back the control

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Page 1: Stress Ulcer Prophylaxis - Wild Apricot Ulcer... · • Who should be receiving stress ulcer prophylaxis in your ... Risk of Bleeding • Table 2 from 1999 ... – Thrombocytopenia

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1

Stress Ulcer Prophylaxis

Rob Wills, Pharm.D., BCPS

Clinical Manager of Pharmacy

PGY1 Residency Program Director

St. Luke’s Boise-Meridian Medical Centers

Disclosure Statement

• No conflict of interest

Objectives

• Who should be receiving stress ulcer prophylaxis in your

institution?

– Pathophysiology

– Risk Factors

• What medications are best to use to prevent stress ulcers?

– The great debate: PPI’s vs. H2RA’s vs. sucralfate

• What are the complications of providing stress ulcer prophylaxis?

– Strategies for gaining back the control

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Objectives

• Who should be receiving stress ulcer prophylaxis in your

institution?

– Pathophysiology

– Risk Factors

• What medications are best to use to prevent stress ulcers?

– The great debate: PPI’s vs. H2RA’s vs. sucralfate

• What are the complications of providing stress ulcer prophylaxis?

– Strategies for gaining back the control

The Guidelines

• Last updated 1999

• What’s missing?

• Are they still relevant?

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.

History

1800’s

Erosions & Gastric Ulcers have been known

to develop

1800’s

Erosions & Gastric Ulcers have been known

to develop

1970’s

Gastric Acid linked as possible cause of stress

ulcer development

1970’s

Gastric Acid linked as possible cause of stress

ulcer development

1980’s

Incidence of stress-ulcer related bleeding was

found to be decreased by increasing gastric pH

1980’s

Incidence of stress-ulcer related bleeding was

found to be decreased by increasing gastric pH

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.Schuster DP. Crit Care Med. 1993;21:4-6.Schuster DP, et al. Am J Med. 1984;76:623-630.Sesler JM. ACCN. 2007;18(2):119-128.

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Terminology

• Stress Ulcers

• Ulceration

• Stress erosions

• Stress gastritis

• Hemorrhagic gastritis

• Erosive gastritis

• Peptic Ulcers

• Gastric Ulcers

• Stress-Related Mucosal

Disease

– SRMD

Sesler JM. ACCN. 2007;18(2):119-128.

Diagnosis & Appearance

• Diagnosis

– Endoscopic evidence

• Appearance

– Diffuse sub-epithelial hemorrhage with or

without erosions

CHEST. 2001;119(4):1222-1241. doi:10.1378/chest.119.4.1222

Illustration of the difference between an erosion and an ulcer. An erosion is a mucosal break that does not penetrate themuscularismucosae, whereas an ulcer does penetrate the muscularismucosae. Reprinted with permission from Weinstein.39

Figure Legend:

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Where is this occurring?

• SRMD typically occur in

the acid-producing

areas of stomach

– Upper body

– Fundus

Accessed from www.webmd.com 8-2012

Risk of Bleeding

• Table 2 from 1999

ASHP Guidelines

– Diverse endpoints

– What’s it all mean?

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.

Definitions

• Clinically Important

Bleeding

• Guaiac-positive stool

• Nasogastric (NG) aspirate

• Frank hematemesis or

melena without an

accompanied decrease in

hemoglobin level, BP or a

need for transfusionASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.Schuster DP. Crit Care Med. 1993;21:4-6.Schuster DP, et al. Am J Med. 1984;76:623-630.Sesler JM. ACCN. 2007;18(2):119-128.

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Classification of GI Bleeding

Outcome Measure of

GI Bleeding

Definition Incidence

Endoscopic Evidence Endoscopic evidence of gastroduodenal SRMD lesions

Present in 74 to 100% of

ICU patients

Occult Guaiac-positive stools or nasogastric aspirate

Present in 15 to 50% of ICU

patients

Overt OR

Clinically evident

Hematemesis, gross blood or coffee grounds material in nasogastric tube aspirate, hematochezia or melena

Present in less than 5 to

25% of ICU patients

Clinically Significant Gastroduondenal bleeding associated with clinically important complications- Hemodynamic compromise- Need for blood transfusion- Need for surgery

Present in less than 5% of

ICU patients

Table 1

Naylor DF. Clinical Applications of Stress Ulcer Prophylaxis. Soc of Crit Care Med. 2012 conference.Cook et al. NEJM.1994;330:377-381.

Outcome Measure of

GI Bleeding

Definition Incidence

Clinically Important Gastrointestinal bleeding with- Spontaneous decrease in systolic blood

pressure of more than 20 mmHg within 24 hours of the first GI episode

- Orthostatic increase in heart rate of 20

beats/minute and a decrease in systolic blood pressure of 10 mmHg when the patient assumes an upright position

- Decrease in hemoglobin concentration of at least 2 g/dL and transfusion of 2 units of packed red blood cells within 24 hours after

bleeding, or- Failure of the hemoglobin concentration to

increase after transfusion by at least the number of transfused units minus 2 g/dL

Present in 0.1 to 4%

of ICU patients

Table 1 cont

Naylor DF. Clinical Applications of Stress Ulcer Prophylaxis. Soc of Crit Care Med. 2012 conference.

Cook et al. NEJM.1994;330:377-381.

Epidemiology

• GI Ulceration

– 75% to 100% occur within 24 hours of ICU

admission

• Overt bleeding < 25%

• Clinically significant bleeding < 6%

– Rates are decreasing

Cook DJ, NEJM. 1994;330:377-81

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Outcomes

• Morbidity

• Increases length of ICU stay from 4 to 8 days, or even 11 days longer stay

• Mortality

– 50% - 75% of patients with clinically significant bleed

– ~ 12% directly attributable to the bleed

• Cost of bleed

– $7000 in 1999

Cook et al. NEJM.1994;330:377-381.Sesler JM. ACCN. 2007;18(2):119-128.

AJHP. 1999:56;347-379.

CHEST. 2001;119(4):1222-1241. doi:10.1378/chest.119.4.1222

Proposed mechanisms for development of stressulceration. SRMD results from the complex interaction of multiplesystems. The specific relationships depicted remain somewhatspeculative. Reprinted with permission from Bresalier.44

Figure Legend:

GI Complications in Patients Receiving Mechanical Ventilation*

CHEST. 2001;119(4):1222-1241. doi:10.1378/chest.119.4.1222

Proposed mechanisms for the development of GI complications during MV. MV can contribute to the pathogenesis of GI problems in much the same way as critical illness by affectingsplanchnicblood flow and leading to increased release ofproinflammatorymediators. SIRS = systemic inflammatory response syndrome; TNF-α = tumor necrosis factor-α.

Figure Legend:

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Critical Illness

Splanchnic Hypoperfusion

Reduced

HCO3 Secretion

Reduced

Mucosal Blood

Flow

Decreased

GI Motility

Acid Back

Diffusion

Decreased Cardiac

Output

Increased

Catecholamines

HypovolemiaProinflammatory

Cytokine Release

Acute Stress Ulcer

Increased

Vasoconstriction

Mutlu GM, Mutlu EA, Factor P. GI complications in patients receiving mechanical ventilation. Chest. 2001;119:1222-1241.

Risk factors for SRMD

• Respiratory failure requiring

mechanical ventilation ≥ 48 hrs

• Coagulopathy (INR > 1.5 or

platelet count < 50,000 mm3

• Acute renal insufficiency

• Acute hepatic failure

• Sepsis syndrome

• Hypotension

• Severe head or spinal cord injury

• Anticoagulation

• History of gastrointestinal

bleeding

• Low intragastric pH

• Thermal injury involving more

than 35% of the BSA

• Major surgery lasting > 4 hrs

• High dose corticosteroids

• Enteral feedings

Cook et al. NEJM.1994;330:377-381.Sesler JM. ACCN. 2007;18(2):119-128.

AJHP. 1999:56;347-379.

Patients admitted to Intensive Care Unit

Respiratory failure requiring mechanical ventilation > 48 hrs

Coagulopathy

Thermal Injury involving more than 35% of the body surface area

Hepatic Failure or Hepatic/Renal Transplant

Multiple Trauma

Spinal Cord Injury

History of GI Ulceration

Presence of at least two of the following:

Sepsis, ICU stay of > 1 week, occult or overt bleeding for > 6 days, corticosteroid therapy

Indications for Stress Ulcer Prophylaxis1999

AJHP. 1999:56;347-379.

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Timeline

1999

Risk for clinically important GI bleeding

is dramatically decreasing

1999

Risk for clinically important GI bleeding

is dramatically decreasing

Incidence dropping to 0.1% to 4% with or

without prophylaxis

Incidence dropping to 0.1% to 4% with or

without prophylaxis

Why?

Better drugs?

Better care in our ICU’s?

Why?

Better drugs?

Better care in our ICU’s?

Cook et al. NEJM.1994;330:377-381.Cook et al. Crit Care Med. 1999;27:2812-2817.

Prophylaxis per Risk Factor

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.

Agents for SUP

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.

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Patient Case

• 57 year old male admitted to the

ICU with sepsis 2 days ago

– Placed on Mechanical Vent at that

time due to respiratory failure

– Also experiencing some acute

renal failure

• SrCr increased from 1.2 to 4.8

– Medications include

• Norepinephrine to help maintain

normal blood pressure

• Vancomycin, Zosyn, and

Clindamycin

Accessed from heart-valve-surgery.com August 2012

Patient Case

• Should this patient

receive Stress Ulcer

Prophylaxis?

• 57 year old male admitted to

the ICU with sepsis 2 days ago

– Placed on Mechanical Vent at

that time

– Also experiencing some acute

renal failure

– Medications include

• Norepinephrine to help

maintain normal blood pressure

• Vancomycin, Zosyn, and

Clindamycin

Patient Case

• Should this patient receive Stress

Ulcer Prophylaxis?

• If yes, which of the following

is best to use?

a. Pantoprazole 40 mg IV daily

b. Ranitidine 50 mg IV q 8hrs

c. Cimetidine 50 mg/hr

d. Sucralfate 1 gm q 6 hrs NG tube

e. Enteral Nutrition

• 57 year old male admitted to the

ICU with sepsis approx. 2 days

ago

– Placed on Mechanical Vent at that

time

– Also experiencing some acute

renal failure

– Medications include

• Norepinephrine to help maintain

normal blood pressure

• Vancomycin, Zosyn, and

Clindamycin

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WHAT MEDICATIONS ARE THE BEST

FOR STRESS ULCER PROPHYLAXIS?

The great debate: PPI’s vs. H2RA’s vs. Sucralfate

Therapeutic Options

• Antacids

• Sucralfate

• Histamine 2 Receptor

Antagonists (H2RA)

• Proton Pump Inhibitors

(PPI)

Antacids

• Rarely used today

– Labor intensive

– Dosed to pH

• pH of 3.5 to 4

• 30 to 60 cc every 30 to 60 minutes

• Required frequent monitoring

– Many adverse effects or interactions

• Diarrhea, constipation,

fluoroquinolone interaction, etc.

• Pneumonia

Blogs.cbn.com

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Sucralfate• Vasic, non-absorbable aluminum

salt of saccharose octasulfate.

• Doesn’t change the pH of the

stomach

– Thought to have less risk of

pneumonia

• MOA:

– In acidic environment forms a

polymer that eventually binds with

the protein cations in the exposed

ulcer

Drsfosterandsmith.com

Histamine Receptor Antagonists

(H2RA’s)• Started in the mid 90’s with

cimetidine infusion

• IV and PO formulation

• ADR

– Thrombocytopenia

– Pneumonia

• Drug interactions

– P450, etc.

www.medicineworld.org

Proton Pump Inhibitors

• Activated by protination in parietal cells

and then binds to H/K counter exchange

ATPase to block acid production

• IV and PO forms

• Becoming less expensive

• No renal adjustments

• ADR’s

– Pneumonia

– C.diff

• Possible drug interactions

– P450’s and Clopidogrel

Cloudfront.net

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Medication Route Dose Renal Insufficiency(CrCl < 50 mL/min)

Sucralfate PO

NG

1 gm Q6h Caution in severe renal

impairment

Histamine2 Receptor Antagonists

Cimetidine PO

NG

300 mg Q6h 300 mg PO Q12h

Ranitidine IV 50 mg Q6 to 8 hrs Reduce dose to 50 mg Q24

hr

PO 150 mg PO BID Reduce dose to 150 mg Q24

hr

Famotidine PO

NG & IV

20 mg Q12h Reduce dose to 20 mg daily

Dosing

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.Lexi-comp Online. Accessed 8-2012Sesler JM. ACCN. 2007;18(2):119-128.

Medication Route Dose

Proton Pump Inhibitors

Esomeprazole PO

NG & IV

40 mg daily

Lansoprazole PO

NG & IV

15 or 30 mg daily

Omeprazole PO

NG

20 to 40 mg daily

Pantoprazole PO

NG & IV

40 mg daily

Dosing

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.Lexi-comp Online. Accessed 8-2012Sesler JM. ACCN. 2007;18(2):119-128.

Which Agent is Better?

• H2RA’s vs. Antacids

• H2RA’s vs. Sucralfate

• H2RA’s vs. PPI’s

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Medication Mode of ActionOther Protective

Mechanisms

Comments/

Complications

AntacidsDirect neutralization of gastric acid in a dose-dependent fashion Gastric pH is kept > 3.5–4.0

Binds to bile acids (Al+3 based) Increases local PG production improved mucosal blood flow increased mucus/HCO3 production Stimulates epithelial regeneration

Increased nursing costs Hypermagnesemia (Mg+2 based) Hypophosphotemia (Al+3 based) Constipation (Al+3 based) Diarrhea (Mg+2 based) Interferes with absorption of certain drugs (eg, tetracycline, quinolones)

H2-BlockersIncrease gastric pH by blocking H2-receptors

No beneficial cytoprotective effects

Continuous provides better pH control compared to intermittent, but is not more effective as a preventive therapy Interstitial nephritis Confusion (especially elderly) Thrombocytopenia Hypotension, sinus bradycardia (rapid IV infusion) P450-mediated effects (particularly cimetidine)

Proton pump inhibitors

Inhibits parietal cell H+-K+-adenosine triphosphatase and blocks the final step of H+ ion production

No beneficial cytoprotective effects Diarrhea P450-mediated effects

Sucralfate

Aluminum sucrose sulfate Does not affect the luminal pH Acts via coating and protection of gastric mucosa

Increases local PG production Stimulates mucus/HCO3 production (independently of PG) Stimulates epidermal growth factor

Antibacterial effects Costs less than IV H2-blockers Constipation Interferes with absorption of certain drugs (eg, tetracycline, quinolones)

Prostaglandin analogsAntisecretory and cytoprotective effects on the gastric mucosa

Inhibits acid secretion at high doses Diarrhea Abdominal pain

PirenzepineAnticholinergic Inhibits acid secretion via M1 muscarinic receptors

Increases local PG production Stimulates mucus/HCO3 production Improves mucosal blood flow (2 and 3 can occur independently of PG)

Not available in North America

CHEST. 2001;119(4):1222-1241. doi:10.1378/chest.119.4.1222

Critical Illness

Splanchnic Hypoperfusion

Reduced

HCO3 Secretion

Reduced

Mucosal Blood

Flow

Decreased

GI Motility

Acid Back

Diffusion

Decreased Cardiac

Output

Increased

Catecholamines

HypovolemiaProinflammatory

Cytokine Release

Acute Stress Ulcer

Increased

Vasoconstriction

Mutlu GM, Mutlu EA, Factor P. GI complications in patients receiving mechanical ventilation. Chest. 2001;119:1222-1241.

Stress

Impaired Proton Removal

Reperfusion

Injury

Free Radical Formation &

Inflammation

Acid Injury

Impaired Proton Buffering Pepsinogen

Activation

Mucosal Ischemia

Impaired Blood

Flow

Impaired Defense

Mechanism

Acute Stress Ulcer

Mutlu GM, Mutlu EA, Factor P. GI complications in patients receiving mechanical ventilation. Chest. 2001;119:1222-1241.

GI BleedMacLaren R. A Review of StressUlcer Prophylaxis. J Pharm Prac. 2002;15:147 - 157

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Stress

Impaired Proton Removal

Reperfusion

Injury

Free Radical Formation &

Inflammation

Acid Injury

Impaired Proton Buffering Pepsinogen

Activation

Mucosal Ischemia

Impaired Blood

Flow

Impaired Defense

Mechanism

Acute Stress Ulcer

Mutlu GM, Mutlu EA, Factor P. GI complications in patients receiving mechanical ventilation. Chest. 2001;119:1222-1241.

GI Bleed MacLaren R. A Review of StressUlcer Prophylaxis. J Pharm Prac. 2002;15:147 - 157

PPI’s

& H2RA’s

Stress

Impaired Proton Removal

Reperfusion

Injury

Free Radical Formation &

Inflammation

Acid Injury

Impaired Proton Buffering Pepsinogen

Activation

Mucosal Ischemia

Impaired Blood

Flow

Impaired Defense

Mechanism

Acute Stress Ulcer

Mutlu GM, Mutlu EA, Factor P. GI complications in patients receiving mechanical ventilation. Chest. 2001;119:1222-1241.

GI BleedMacLaren R. A Review of StressUlcer Prophylaxis. J Pharm Prac. 2002;15:147 - 157

PPI’s

H2RA’s H2RA’s

Does Enteral Nutrition Help?

• Benefits in critically ill

– Improves splanchnic blood flow

– Reduces macroscopic ulceration

• Does it reduce the risk of developing SRMD?

– Lack of significant evidence

• Bottom line

– Don’t use Enteral nutrition as sole SRMD prophylaxis measure

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What about Adverse Events of

prophylaxis?• Delirium

• Thrombocytopenia

• Community Acquired Pneumonia

• Clostridium difficile

• Fractures

• Nutrient malabsorption

• Ventilator Associated Pneumonia

• Acute interstitial nephritis

Naylor DF, Rebuck JA, Maclaren R, et al. Clinical Applications of Stress Ulcer Prophylaxis. 2012. SCCM Annual Conference.

What about Adverse Events of

prophylaxis?• Delirium

• Thrombocytopenia

• Community Acquired Pneumonia

• Clostridium difficile

• Nutrient malabsorption

• Ventilator Associated Pneumonia

• Acute interstitial nephritis

Naylor DF, Rebuck JA, Maclaren R, et al. Clinical Applications of Stress Ulcer Prophylaxis. 2012. SCCM Annual Conference.

Risk of Pneumonia

ASHP Therapeutic Guidelines on SUP. AJHP.1999;56(4):347-379.

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Use of Proton Pump Inhibitors and the Risk of Community-Acquired Pneumonia: A Population-Based Case-Control

Study

Arch Intern Med. 2007;167(9):950-955. doi:10.1001/archinte.167.9.950

Association Between Exposure to Proton Pump Inhibitors (PPIs) or Histamine2-Receptor Antagonists (H2RAs) and Community-Acquired Pneumonia (CAP)

Figure Legend:

Association Between the Use of Proton Pump Inhibitors (PPIs) and Community-Acquired Pneumonia (CAP), Subgroup Analysis Within Modified End Points*

Figure Legend:

Use of Proton Pump Inhibitors and the Risk of Community-Acquired Pneumonia: A Population-Based Case-Control

Study

Arch Intern Med. 2007;167(9):950-955. doi:10.1001/archinte.167.9.950

Stratum-Specific Odds Ratios (ORs) for the Association Between Current Use of Proton Pump Inhibitors (PPIs) and Community-Acquired Pneumonia (CAP)

Figure Legend:

Use of Proton Pump Inhibitors and the Risk of Community-Acquired Pneumonia: A Population-Based Case-Control

Study

Arch Intern Med. 2007;167(9):950-955. doi:10.1001/archinte.167.9.950

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Use of Proton Pump Inhibitors and the Risk of Community-Acquired Pneumonia: A Population-Based Case-Control

Study

Arch Intern Med. 2007;167(9):950-955. doi:10.1001/archinte.167.9.950

Association between current use of proton pump inhibitors (PPIs) and community-acquired pneumonia, according to the timing of first PPI prescription. ORs indicates odds ratios.

Figure Legend:

Proton-Pump Inhibitor Use and the Risk for

Community-Acquired Pneumonia

Ann Intern Med. 2008;149(6):391-398.

Odds Ratios for Community-Acquired Pneumonia Associated with Exposure to Proton-Pump Inhibitors and Histamine-2–Receptor Antagonists among New Recipients of Each Drug*

Figure Legend:

Ann Intern Med. 2008;149(6):391-398.

Odds Ratios for Community-Acquired Pneumonia Associated with Proton-Pump Inhibitor Exposure with Expanded Case–Control Matching Criteria

Figure Legend:

Proton-Pump Inhibitor Use and the Risk for

Community-Acquired Pneumonia

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Risk of Community-Acquired Pneumonia and Use of Gastric Acid–Suppressive Drugs

JAMA. 2004;292(16):1955-1960. doi:10.1001/jama.292.16.1955

JAMA. 2004;292(16):1955-1960. doi:10.1001/jama.292.16.1955

Community-Acquired PneumoniaComparing the Literature

Current PPI Use

OR (CI)

Current H2RA Use

OR (CI)

Arch Intern Med 2007 1.5 (1.3 – 1.7) 1.10 (0.8 – 1.3)

Ann Intern Med 2008 1.02 (0.97 – 1.08) 0.99 (0.95 – 1.04)

JAMA 2004 1.89 (1.36 – 2.62) 1.63 (1.07 – 2.48)

JAMA. 2004;292(16):1955-1960. doi:10.1001/jama.292.16.1955

Arch Intern Med. 2007;167(9):950-955. doi:10.1001/archinte.167.9.950

Ann Intern Med. 2008;149(6):391-398.

Naylor DF. Clinical Applications of Stress Ulcer Prophylaxis. Soc of Crit Care Med. 2012 conference.

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Community-Acquired PneumoniaRecent PPI Initiation & Increased Risk

PPI Initiation & CAP Risk

OR (95% CI)

Ann Intern Med 2008 2.45 (2.04 – 2.95)

Arch Intern Med 2007 2.30 (1.22 – 4.35)

JAMA 2004 2.24 (1.42 – 3.54)

Epidemiol 2009 1.21 (0.9 – 1.63)

Am J Med 2010 1.83 (1.24 – 2.70)

Overall CAP Risk*: 1.92 (1.40 – 2.63)

JAMA. 2004;292(16):1955-1960. doi:10.1001/jama.292.16.1955

Eurich D, et al. Am J Med 2010:123

Arch Intern Med. 2007;167(9):950-955. doi:10.1001/archinte.167.9.950

Ann Intern Med. 2008;149(6):391-398.

Naylor DF. Clinical Applications of Stress Ulcer Prophylaxis. Soc of Crit Care Med. 2012 conference.

* Dose response relationship also noted with high dose PPI use

Community-Acquired Pneumonia

• Gastric acidity decreased with H2RA or PPI

treatment

• Loss of protective defense mechanism of

hyperchlorhydria

– Possible increased risk of CAP

• Incidence of CAP: 0.6 vs. 2.45 per 100 person

years on acid suppression treatment

JAMA. 2004;292(16):1955-1960. doi:10.1001/jama.292.16.1955

Naylor DF. Clinical Applications of Stress Ulcer Prophylaxis. Soc of Crit Care Med. 2012 conference.

Acid-Suppressive Medication Use and the Risk for Hospital-Acquired Pneumonia

JAMA. 2009;301(20):2120-2128. doi:10.1001/jama.2009.722

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Colonization on Culture of Gastric Aspirates, Pharyngeal Swabs, and Tracheal Aspirates from 47 Study Patients.

Driks MR et al. N Engl J Med 1987;317:1376-

1382.

Clostridium difficile• FDA Warning links PPIs to

C. difficile-Associated

Diarrhea

• Feb 8th, 2012

– FDA Safety Alert warned that

PPI’s may be associated with

an increased risk for

Clostridium difficile

associated diarrhea

Pharmacy Practice News – March 2012

Copyright © 2012 American Medical

Association. All rights reserved.

Use of Gastric Acid–Suppressive Agents and the Risk of Community-Acquired Clostridium difficile–Associated

Disease

JAMA. 2005;294(23):2989-2995. doi:10.1001/jama.294.23.2989

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Howell et al. Arch Intern Med. 2010;170(9):784-790.

Howell et al. Arch Intern Med. 2010;170(9):784-790.

Original Article

Host and Pathogen Factors for Clostridium difficile

Infection and Colonization

• In this prospective cohort study of patients admitted to hospitals in Quebec and Ontario, 2.8% of patients had Clostridium difficile infection and 3.0% had asymptomatic C. difficile colonization during hospitalization.

N Engl J MedVolume 365(18):1693-1703

November 3, 2011

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Loo VG et al. N Engl J Med 2011;365:1693-1703

Odds Ratios for Health Care–Associated Clostridium difficile Infection and Colonization According to Various Patient and Pathogen Characteristics.

Loo VG et al. N Engl J Med 2011;365:1693-1703

Odds Ratios for Health Care–Associated Clostridium difficile Infection among Study Patients Who Had Positive Cultures for C. difficile, According to Various Patient and Pathogen

Characteristics and Type of Analysis.

Loo VG et al. N Engl J Med 2011;365:1693-1703

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Times to Health Care–Associated Clostridium difficile Infection and Colonization during Hospitalization.

Loo VG et al. N Engl J Med 2011;365:1693-1703

Proposed Mechanism

• Higher pH allows for opportunistic infections to survive

– Gatric Acid suppression has been associated with increased

colonization even into the typically sterile upper GI tract altering GI

flora

• H2RA’s and PPI’s found to increase patient risk

– PPI’s possibly more so due to increased acid suppression

• Question about c diff?

– Transmission via acid resistant spores

– Instead the vegetative form is able to survive

Dial et al. JAMA. 2005;23:2989-2995.

Risk of Recurrent C. difficile• 1166 patients

– Metronidazole or

Vancomycin treated CDI

– 527 (45.2%) received PPI’s

– Similar antibiotic exposure

in both groups

• Results

– 42% increased risk of

recurrence

Linsky et al. Arch Intern Med. 2010;170(9):772-778.

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Proton Pump Inhibitors and Risk for Recurrent Clostridium

difficile Infection

Arch Intern Med. 2010;170(9):772-778. doi:10.1001/archinternmed.2010.73

Recurrence-free survival in those exposed vs unexposed to proton pump inhibitors (PPIs) during treatment for incident Clostridium difficile infection. Time to recurrence started from the incident toxin finding or the start of antibiotic treatment (≤3 days after the diagnosis).

Figure Legend:

Risk of C.diff Talking Points

• H2RA are less likely to be associated with C.

difficile infection

• Recent PPI exposure may lead to an increased

risk of C. difficile infection and recurrent

infection

Naylor DF. Clinical Applications of Stress Ulcer Prophylaxis. Soc of Crit Care Med. 2012 conference.

When Do We Stop?

• Patients should be

reassessed daily

• Once the indication is

removed the med

should be discontinued

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652 ICU Admissions

652 ICU Admissions

248 patients initiated on Stress Ulcer

Prophylaxis in ICU

215/248 (84%) transferred from ICU

on SUP

24% Discharged from hospital on SUP

without appropriate indication

523 ICU Admissions

523 ICU Admissions

357 patients received SUP in ICU

316/357 (89%) were transferred out of ICU

on SUP

24% Discharged from hospital on SUP with

no indication

Sent home with souvenir?

Wohlt et al. Ann of

Pharmacotherapy.

2007;41:1611-1616.

Murphy et al.

Pharmacotherapy.

2008;28:968-766.

What can we do?

• Start with education

– Hatch et al. 2010

• Looked at educational

intervention to reduce

non-indicated prescribing

of gastric acid

suppressants for SUP

Hatch JB, et al. Ann of

Pharmacotherapy.

2010;44:1565-71.

Pharmacist Intervention

1. Dosing card with

indications

2. Pharmacist interaction

during multidisciplinary

rounds

3. Medication

reconciliation by RPh at

discharge

Hatch JB, et al. Ann of

Pharmacotherapy.

2010;44:1565-71.

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Results

356 patients included in study

356 patients included in study

158 (44%) were using acid-

suppressing meds prior to admission

Compared to 25.6% in Wohlt’s

study

308 received SUP while in ICU

308 received SUP while in ICU

11% had no identifiable indication

259 continued upon transfer out of the ICU

259 continued upon transfer out of the ICU

84 (24%) had no clear indication

Improvement of 50.7% from

previous study

After dischargeAfter discharge

197 continued acid-suppression

therapy

31 (8.7%) not having a clear

indication

64.3% reduction

Hatch JB, et al. Ann of

Pharmacotherapy.

2010;44:1565-71.

Wohlt et al. Ann of

Pharmacotherapy.

2007;41:1611-1616.

Applying this to your practice

H2RA’s are the preferred agent for initial prevention of GI hemorrhage resulting from Stress Related Mucosal Disease in patients that are at risk

PPI’s should be reserved for patients unable to tolerate H2RA’s

PPI therapy should be given enterally or via intermittent intravenous administration

Antacids and sucralfate are not recommended for prevention of SRMD

Enteral nutrition should not be used alone as prophylaxis

Naylor DF, Rebuck JA, Maclaren R, et al. Clinical Applications of Stress Ulcer Prophylaxis. 2012. SCCM Annual Conference.

Questions

• Who should be receiving stress ulcer

prophylaxis in your institution?

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Only those with clear indications

• Drug therapy is recommended for any One of the following

1. Respiratory failure requiring Mechanical Ventilation likely

greater than 48 hours

2. Coagulopathy

• Platelet count < 50,000

• INR > 1.5

• aPTT > 2 x control

• Note: prophylaxis with anticoagulants do not constitute a

coagulopathy

AJHP. 1999:56;347-379.

Only those with clear indications

• Drug therapy is recommended for Two or More of the following risk factors

– Head or spinal cord injury

– Severe burn ( > 35% of BSA)

– Hypoperfusion

– Acute organ dysfunction

– History of GI ulcer/bleeding within 1 year

– High doses of corticosteroids

– Liver failure associated with coagulopathy

– Postoperative transplant

– Acute kidney injury

– Major surgery

– Multiple trauma

AJHP. 1999:56;347-379.

Respiratory failure requiring mechanical ventilation for more than 24 hours

Coagulopathy

Acute Renal Failure

Sepsis Syndrome

Prolonged Hypotension

Major Surgery lasting more than 48hrs

Severe Head Trauma

History of GI Bleeding

Burns involving more than 35% of the body surface area

Indications for Stress Ulcer Prophylaxis

Naylor DF, Rebuck JA, Maclaren R, et al. Clinical Applications of Stress Ulcer Prophylaxis. 2012. SCCM Annual Conference.

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Questions

• What medications are best to use to prevent

stress ulcers?

– The great debate: PPI’s vs. H2RA’s vs. Sucralfate

Pharmacotherapy

1. H2RA’s are the preferred agent

2. PPI’s should be reserved for patients unable to tolerate H2RA’s

Naylor DF, Rebuck JA, Maclaren R, et al. Clinical Applications of Stress Ulcer Prophylaxis. 2012. SCCM Annual Conference.

Questions

• What are the complications of providing

stress ulcer prophylaxis?

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What about Adverse Events of

prophylaxis?• Delirium

• Thrombocytopenia

• Community Acquired Pneumonia

• Clostridium difficile

• Nutrient malabsorption

• Ventilator Associated Pneumonia

• Acute interstitial nephritis

Naylor DF, Rebuck JA, Maclaren R, et al. Clinical Applications of Stress Ulcer Prophylaxis. 2012. SCCM Annual Conference.