Part 3 Flashcards

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1
Q

What are the common gastrointestinal disorders?

A

Peptic ulcer, nausea and vomiting, constipation, hypomotility disorders, inflammatory bowel diseases.

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2
Q

Define peptic ulcer.

A

It is a damage in gastric mucosa due to an imbalance between mucosal defense and gastric acid secretion.

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3
Q

What causes a peptic ulcer?

A

Imbalance between mucosal defense and gastric acid secretion.

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4
Q

Name the regulators of gastric acid secretion.

A

Acetylcholine, histamine, gastrin.

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5
Q

What is the function of prostaglandins in gastric mucosa?

A

Inhibit HCL secretion and stimulate secretion of bicarbonate ions.

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6
Q

Name three causes of decreased mucosal defense in peptic ulcers.

A

Chronic NSAID use, chronic H. pylori infection, stress.

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7
Q

What condition causes increased gastric acid secretion (HCL)?

A

Zollinger-Ellison syndrome.

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8
Q

List risk factors for peptic ulcer.

A

Male gender, O blood group, smoking.

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9
Q

What are the clinical features of a peptic ulcer?

A

Recurrent abdominal pain, vomiting, loss of appetite, heartburn.

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10
Q

What are the two types of peptic ulcers?

A

Gastric ulcer and duodenal ulcer.

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11
Q

Name complications of peptic ulcers.

A

Hemorrhage, perforation, obstruction, malignant transformation.

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12
Q

What are the treatment strategies for peptic ulcers?

A

Acid suppressive therapy, mucosal protective therapy, antacids, H. pylori therapy.

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13
Q

Examples of H2-receptor antagonists.

A

Cimetidine, ranitidine, famotidine.

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14
Q

Examples of proton pump inhibitors (PPIs).

A

Omeprazole, lansoprazole, pantoprazole.

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15
Q

What is the mechanism of action of PPIs?

A

Inhibit proton pumps in parietal cells to reduce HCL secretion.

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16
Q

Name a prostaglandin analog used in peptic ulcer.

A

Misoprostol.

17
Q

What combination is used for H. pylori therapy?

A

Two antibiotics and an acid-suppressive drug.

18
Q

What are the two types of antacids?

A

Systemic and non-systemic antacids.

19
Q

What is the primary therapeutic use of antacids?

A

Symptomatic relief of pain and discomfort, not for healing the ulcer.

20
Q

Define nausea and vomiting.

A

Protective reflexes that rid the stomach and intestines of harmful content.

21
Q

What is the mechanism of vomiting classified by?

A

Based on the cause and pathways.

22
Q

Name drug classes used as antiemetics.

A

5-HT3 receptor antagonists, dopamine receptor antagonists, antihistamines, anticholinergics.

23
Q

Example of a 5-HT3 receptor antagonist.

A

Ondansetron.

24
Q

Example of a dopamine receptor antagonist.

A

Prochlorperazine.

25
Q

What antihistamine is safest in pregnancy?

A

Doxylamine.

26
Q

Define constipation.

A

Passage of hard feces less than 3 times a week.

27
Q

Name types of constipation.

A

Acute and chronic.

28
Q

Name non-pharmacological measures for constipation.

A

Fiber-rich diet, increased fluid intake, exercise.

29
Q

Name types of laxatives.

A

Bulk-forming, osmotic, stimulant, stool softeners.

30
Q

Name the two inflammatory bowel diseases.

A

Ulcerative colitis and Crohn’s disease.

31
Q

Name drugs used in IBD treatment.

A

Sulfasalazine, glucocorticoids, antibiotics.

32
Q

What is the mechanism of infliximab?

A

Antibody to TNF-α, a key mediator in Crohn’s disease.