Pharm Drugs Part 1
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An antacid that has also laxative properties
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
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Explore key pharmacological agents in 'Pharm drugs part 1'. This quiz assesses knowledge on drugs like Mg hydroxide, Aprepitant, Famotidine, and others, focusing on their mechanisms and therapeutic uses, crucial for healthcare professionals.
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- 2.
An antiemetic drug mostly used for delayed nausea and vomiting due to cancer chemotherapy
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
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Aprepitant
Correct Answer
A. AprepitantExplanation
Pharmacokinetics
o Oral (aprepitant) and parenteral (fosaprepitant) administration
o Fosaprepitant undergoes metabolic conversion to aprepitant within 30 min of administration
o Oral bioavailability ~65%
o Readily crosses the blood-brain barrier
o Undergoes hepatic metabolism, primarily by CYP3A4
ï‚· Pharmacodynamics
o Mechanism of Action
 Antagonism of brain NK1-receptors
Pharmacological Actions/Effects
 Antiemetic properties
ï‚· Due to central blockade in the area postrema
ï‚· Clinical Pharmacology
*********** Clinical Uses*********
Used in combination with glucocorticoids and 5-HT3-receptor antagonists for the preventation of acute and delayed nausea and vomiting from highly emetogenic chemotherapeutic regimens
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ï‚· 80-90% success in cases of acute emesis
ï‚· >70% success in cases of delayed emesis
o Adverse Effects/Toxicity
 Aprepitant
ï‚· Serious reactions
o Neutropenia, bradycardia, dehydration, angioedema, Stevens-Johnson syndrome
ï‚· Common reactions
o Fatigue, nausea/vomiting, hiccups, constipation, diarrhea, anorexia, headache, dizziness, pruritus, hypotension, bradycardia, dehydration, heartburn, abdominal pain, gastritis, tinnitus, neutropenia, fever, insomnia, mucositis, flatulence, anemiaRate this question:
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- 3.
An antiulcer agent that can inhibit the 24 hour gastric acid secretion by about 70%.
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. FamotidineExplanation
omeprazole decreases from 90 to 98%Rate this question:
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- 4.
A prostaglandin E1 analogue which exerts a cytoprotective effect on gastric mucosa
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. MisoprostolExplanation
Misoprostol is a prostaglandin E1 analogue that is known to have a cytoprotective effect on the gastric mucosa. It helps to prevent gastric ulcers by increasing the production of mucus and bicarbonate in the stomach, and by reducing the secretion of gastric acid. This cytoprotective effect makes Misoprostol an effective medication for preventing gastric ulcers caused by nonsteroidal anti-inflammatory drugs (NSAIDs) or for treating ulcers caused by Helicobacter pylori infection.Rate this question:
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- 5.
An antiulcer agent which binds to the necrotic tissue of peptic ulcer so acting as a barrier to gastric juice.
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. SucralfateExplanation
Sucralfate is an antiulcer agent that works by binding to the necrotic tissue of a peptic ulcer. This binding forms a protective barrier over the ulcer, preventing further damage from gastric juice.Rate this question:
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- 6.
An antiulcer agent that can inhibit the 24 hour gastric acid secretion by about 80-95%.
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. OmeprazoleExplanation
Omeprazole is a proton pump inhibitor (PPI) that is used as an antiulcer agent. It works by inhibiting the enzyme responsible for the final step in gastric acid secretion, leading to a decrease in the production of stomach acid. Studies have shown that omeprazole can inhibit gastric acid secretion by about 80-95% over a 24-hour period, making it an effective choice for reducing acid production in the stomach.Rate this question:
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- 7.
A drug that can increase upper gastrointestinal motility by activating motilin receptors
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. ErythromycinExplanation
Erythromycin is a macrolide antibiotic that can also act as a motilin receptor agonist. Motilin receptors are found in the upper gastrointestinal tract and their activation increases gastrointestinal motility. Therefore, erythromycin can increase upper gastrointestinal motility by directly stimulating these receptors.Rate this question:
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- 8.
A drug that distends the colon wall so stimulating peristaltic activity.
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. MethylcelluloseExplanation
Methylcellulose is a drug that is commonly used as a bulk-forming laxative. It works by absorbing water in the intestine, which then increases the size and moisture content of the stool. This helps to stimulate peristaltic activity, or the movement of the intestines, leading to increased bowel movements and relief from constipation.Rate this question:
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- 9.
An opioid drug used to treat diarrhea.
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. LoperamideExplanation
Loperamide is an opioid drug that is commonly used to treat diarrhea. It works by slowing down the movement of the intestines, which helps to reduce the frequency and urgency of bowel movements. Loperamide is available over-the-counter and is often used to manage acute diarrhea or chronic diarrhea associated with conditions such as irritable bowel syndrome. It is not recommended for use in cases of diarrhea caused by infection or inflammatory bowel disease.Rate this question:
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- 10.
A salicylate derivative used in inflammatory bowel diseases
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Bisacodyl
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Ca carbonate
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Castor oil
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Docusate
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Erythromycin
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Famotidine
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Loperamide
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Meclizine
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Mesalamine
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Metoclopramide
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Methylcellulose
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Mg hydroxide
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Mineral oil
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Misoprostol
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Omeprazole
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Ondansetron
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Sucralfate
Correct Answer
A. MesalamineExplanation
Mesalamine is a salicylate derivative commonly used in the treatment of inflammatory bowel diseases such as ulcerative colitis and Crohn's disease. It works by reducing inflammation in the colon and rectum, helping to relieve symptoms such as diarrhea, abdominal pain, and rectal bleeding. Mesalamine is available in various forms, including oral tablets, capsules, and rectal suppositories or enemas. It is considered a first-line treatment for mild to moderate inflammatory bowel diseases and can also be used for maintenance therapy to prevent flare-ups.Rate this question:
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- 11.
A 55-year-old man with a history of gastric ulcer presents to the hospital with a persistent epigastric pain in spite of 12 weeks of ranitidine treatment. After an endoscopy which shows a partially healed gastric ulcer, a diagnosis of refractory ulcer is made. Biopsy results are positive for Helicobacter pylori. Which of the following drug combination would represent the best treatment for this patient?
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Amoxicillin, sucralfate and magnesium hydroxide
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Famotidine and magnesium hydroxide
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Omeprazole, famotidine and tetracycline
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Metronidazole and sucralfate
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Omeprazole, metronidazole and clarithromycin
Correct Answer
A. Omeprazole, metronidazole and clarithromycinExplanation
Answer: E
(Katzung, pp 1041, Brunton, pp 979)
A variety of regimens have been used to eradicate Helicobacter pylori, each with different dosing
schedules, adverse effects and cost. Combination therapy with 2 or 3 antibiotics plus a H2-
antagonist or a proton pump inhibitor, is associated with the highest rate of eradication.
Antibiotics effective against H. pylori include amoxicillin, clarithromycin, metronidazole and
tetracycline. Bismuth salt are included in some regimens but they are less effective and more costly
than regimens with 2 antibiotics.
A, B, C, D) All these regimens do not include 2 antibiotics and a H2-antagonist or a proton pump
inhibitor. Moreover antacids and sucralfate are not effective to eradicate H. pylori.Rate this question:
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- 12.
A 61-year-old man comes to the hospital for evaluation of his continuing ulcers. He has been treated for one year for peptic ulcer and has not experienced relief, despite escalating doses of various H2-receptor antagonists. All routine laboratory tests are within normal limits except a serum gastrin level, which is 3240 pm/mL (normal 0-100). Radiographic and endoscopic studies demonstrate one gastric and two duodenal ulcers. A drug with which of the following mechanism of action would be most appropriate for this patient?
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Blockade of H2 receptors of gastric parietal cells
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Activation of EP3 receptors of gastric epithelial cells
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Coating the gastric ulcer craters
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Neutralization of hydrochloric acid in the stomach lumen
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Inhibition of H+/K+ ATPase of gastric parietal cells
Correct Answer
A. Inhibition of H+/K+ ATPase of gastric parietal cellsExplanation
Answer: E
(Katzung, pp 1041, Brunton, pp 980)
The patient is most likely suffering from Zollinger-Ellison syndrome, a rare condition characterized
by a triad of clinical findings, which include severe recurrent peptic ulcer disease, significant
hypersecretion of gastric acid and a tumor of the pancreas (gastrinoma) which functions as an
ectopic source of gastrin. This tumor is located primarily in the pancreas but can be found in other
regions, particularly duodenum. Today most patients with gastrinoma can be effectively treated with
high dose of a drug (like omeprazole) able to Inhibit H+/K+ ATPase of gastric parietal cells.
A) H2-receptors antagonists are less effective than proton pump inhibitors in reducing gastric acid
secretion and therefore are not the drugs of choice in Zollinger-Ellison syndrome.
B) This would be the mechanism of action of misoprostol.
C) This would be the mechanism of action of sucralfate.
D) This would be the mechanism of action of antacids.Rate this question:
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- 13.
A 62-year-old man has been experiencing burning and substernal pain for about 4 weeks. The pain usually occurs after dinner when he is lying on the couch watching TV and is sometimes accompanied by regurgitation of foul-tasting fluid into his mouth. The man has been suffering from Parkinson disease for two years, and is presently receiving bromocriptine and selegiline. Which of the following drugs would be appropriate to treat the patient’s symptoms?
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Atropine
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Misoprostol
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Ondansetron
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Omeprazole
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Metoclopramide
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Cimetidine
Correct Answer
A. OmeprazoleExplanation
Answer: D
(Katzung, pp 1040, Koda-Kimble , pp 27-20)
The substernal pain and reflux of gastric content into the esophagus are classic symptoms of
gastroesophageal reflux disease (GERD) a disorder that affects 7% of the population in USA.
Proton pump inhibitor like omeprazole are highly effective in the treatment of GERD and once daily
dose for 4 weeks will heel 60-80% of patient with severe esophagitis.
A) Atropine is actually contraindicated since it may favor reflux by relaxing the lower esophageal
sphincter
B, C) These drugs are not effective in GERD.
E) Metoclopramide is used in the treatment of GERD because it promotes gastric peristalsis and
also increases the lower esophageal sphincter resting tone. However it is contraindicated in patients
with Parkinson disease, since it is a D2 antagonist.
F) H2-antagonists are less effective that proton pump inhibitors in GERD. Moreover cimetidine is
not appropriate in a patient taking other drugs since it inhibits the metabolism of most drugs,
including selegiline.Rate this question:
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- 14.
A 75-year-old man with terminal metastatic lung cancer has been in the hospital for 4 months. Recently his renal function has deteriorated and now laboratory results show creatinine 5.5 mg/dL and BUN 45 mg/dL. Because of poor food intake, immobility and requirement for opioid analgesia, the patient is severely constipated and needs daily laxative therapy. Which of the following would be a suitable laxative for this patient?
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Lactulose
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Castor oil
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Magnesium hydroxide
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Sodium phosphate
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Mineral oil
Correct Answer
A. LactuloseExplanation
Answer: A
(Katzung, pp 1046, Brunton, pp 993)
Lactulose is a non-absorbable sugar which is hydrolyzed in the colon to organic acids. These acids
draw water into the lumen by osmotic forces, so stimulating colonic propulsive motility by stretching
the colonic wall. The laxative effect is mild.
B) Castor oil is a too strong cathartic to be used regularly.
C, D) Magnesium and phosphate preparation are contraindicated in renal insufficiency since the
small amount of absorbed salt cannot be readily excreted so causing systemic toxicity
(hypermagnesemia or hyperphosphatemia.)
E) Mineral oil has several adverse effects (interference with absorption of fat soluble substances,
elicitation of foreign-body reaction) which preclude its regular use.Rate this question:
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- 15.
A 55-year-old man ,suffering from type II diabetes for 15 years, presented with a 2-month history of nausea, postprandial fullness, and a most uncomfortable bloating, all of which are unrelieved by antacids. The patient also had manifestation of autonomic neuropathy (impotence and orthostatic hypotension). A preliminary diagnosis of diabetic gastroparesis was confirmed later by physical examination and lab results. Which of the following drugs would be suitable to treat patient’s gastrointestinal symptoms?
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Ondansetron
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Loperamide
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Metoclopramide
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Dronabinol
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Omeprazole
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Bisacodyl
Correct Answer
A. MetoclopramideExplanation
Answer: C
(Katzung, pp 1045, Brunton, pp 985)
Prokinetic drugs like metoclopramide have been widely used for treatment of patients with delayed
gastric emptying due to surgery or diabetic gastroparesis. The improvement of gastric emptying is
mild to modest in most cases.
A, B, D, E, F) These drugs are devoid of prokinetic properties.Rate this question:
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Mar 21, 2023Quiz Edited by
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Oct 08, 2012Quiz Created by
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