Podcast
Questions and Answers
What is a major contraindication for inducing vomiting after poisoning?
What is a major contraindication for inducing vomiting after poisoning?
- The poison contains antioxidants
- The patient exhibits severe CNS depression (correct)
- The poison was ingested over 2-3 hours ago
- The patient is conscious and alert
What is the primary use of emetics?
What is the primary use of emetics?
- To enhance appetite in anorexic patients
- To induce vomiting following poisoning (correct)
- To treat motion sickness in cats
- To prevent bradycardia in dogs
Which drug stimulates the emetic center in cats?
Which drug stimulates the emetic center in cats?
- Ropinirole
- Apomorphine
- Xylazine (correct)
- Hydrogen peroxide
Which of the following is NOT a target for drug therapy in treating gastric ulceration?
Which of the following is NOT a target for drug therapy in treating gastric ulceration?
Which emetic is administered orally to stimulate vomiting?
Which emetic is administered orally to stimulate vomiting?
What is the primary action of proton pump inhibitors like omeprazole?
What is the primary action of proton pump inhibitors like omeprazole?
What role do histamine H2 receptor antagonists serve in drug therapy?
What role do histamine H2 receptor antagonists serve in drug therapy?
Which drug is specifically used for ulcers caused by NSAIDs?
Which drug is specifically used for ulcers caused by NSAIDs?
What is a common disadvantage of antacids such as aluminium hydroxide and magnesium hydroxide?
What is a common disadvantage of antacids such as aluminium hydroxide and magnesium hydroxide?
What is the mechanism of action of sucralfate in the treatment of ulcers?
What is the mechanism of action of sucralfate in the treatment of ulcers?
What is the primary function of emesis in animals?
What is the primary function of emesis in animals?
Which receptor is targeted by antiemetics specifically in dogs?
Which receptor is targeted by antiemetics specifically in dogs?
Which of the following antiemetics is known to be a serotonin antagonist?
Which of the following antiemetics is known to be a serotonin antagonist?
The action duration of maropitant as an NK1 receptor antagonist is approximately how long?
The action duration of maropitant as an NK1 receptor antagonist is approximately how long?
Which receptor is specifically associated with sympathomimetic effects in cats?
Which receptor is specifically associated with sympathomimetic effects in cats?
What should be excluded before administering metoclopramide?
What should be excluded before administering metoclopramide?
Which of the following receptors is NOT mentioned as a target for emetics/antiemetics in dogs and cats?
Which of the following receptors is NOT mentioned as a target for emetics/antiemetics in dogs and cats?
Which of the following correctly pairs an animal with its primary emetic target?
Which of the following correctly pairs an animal with its primary emetic target?
What is the primary mechanism by which anti-diarrhoeals reduce diarrhea?
What is the primary mechanism by which anti-diarrhoeals reduce diarrhea?
Which of the following drugs is an opioid agonist used as an anti-diarrhoeal?
Which of the following drugs is an opioid agonist used as an anti-diarrhoeal?
What receptor does maropitant primarily antagonize in veterinary medicine?
What receptor does maropitant primarily antagonize in veterinary medicine?
What is the role of prokinetic medications in gastrointestinal treatment?
What is the role of prokinetic medications in gastrointestinal treatment?
Which of the following agents is used as an emetic in cats?
Which of the following agents is used as an emetic in cats?
Which drug functions as a motilin receptor agonist?
Which drug functions as a motilin receptor agonist?
What distinguishes the action of metoclopramide as an antiemetic?
What distinguishes the action of metoclopramide as an antiemetic?
Which drug has an unknown mechanism of action as a prokinetic?
Which drug has an unknown mechanism of action as a prokinetic?
What is the primary function of emetics?
What is the primary function of emetics?
Which type of receptor is primarily targeted by antiemetics in cats?
Which type of receptor is primarily targeted by antiemetics in cats?
Which of the following is not a class of drugs used in gastrointestinal therapeutics?
Which of the following is not a class of drugs used in gastrointestinal therapeutics?
What is the role of acid blockers in gastrointestinal therapeutics?
What is the role of acid blockers in gastrointestinal therapeutics?
What type of drug is used to decrease the frequency of bowel movements?
What type of drug is used to decrease the frequency of bowel movements?
In dogs, which receptor is targeted by antiemetic drugs?
In dogs, which receptor is targeted by antiemetic drugs?
What is a common use for laxatives in veterinary medicine?
What is a common use for laxatives in veterinary medicine?
Which of these drugs would be classified as a gastro-protectant?
Which of these drugs would be classified as a gastro-protectant?
What is the primary mechanism of action for metoclopramide in the gastrointestinal tract?
What is the primary mechanism of action for metoclopramide in the gastrointestinal tract?
Which of the following laxatives promotes peristalsis by increasing stool bulk?
Which of the following laxatives promotes peristalsis by increasing stool bulk?
Which prokinetic agent has been withdrawn from human medicine due to safety concerns?
Which prokinetic agent has been withdrawn from human medicine due to safety concerns?
What is the role of lubrication in the context of laxatives?
What is the role of lubrication in the context of laxatives?
Which substance is known to have a dual effect as both an antibiotic and a motilin receptor agonist?
Which substance is known to have a dual effect as both an antibiotic and a motilin receptor agonist?
What effect do prokinetics generally have on gastrointestinal motility?
What effect do prokinetics generally have on gastrointestinal motility?
Lactulose acts primarily through which mechanism to relieve constipation?
Lactulose acts primarily through which mechanism to relieve constipation?
What is the secondary action of ranitidine that contributes to its prokinetic effect?
What is the secondary action of ranitidine that contributes to its prokinetic effect?
Flashcards
Vomiting (Emesis)
Vomiting (Emesis)
The reflex action of expelling stomach contents. It's a defense mechanism against toxins, but also associated with various medical conditions.
Emetics
Emetics
Medications that induce vomiting.
Antiemetics
Antiemetics
Medications that prevent or stop vomiting.
Neurokinin-1 receptors (NK1)
Neurokinin-1 receptors (NK1)
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Serotonin receptors (5-HT)
Serotonin receptors (5-HT)
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Histamine-1 receptors (H1)
Histamine-1 receptors (H1)
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Sympathomimetic
Sympathomimetic
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Dopamine receptors (D2)
Dopamine receptors (D2)
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Apomorphine
Apomorphine
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Xylazine
Xylazine
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Xylazine
Xylazine
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H2 Receptor Antagonists
H2 Receptor Antagonists
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Proton Pump Inhibitors (PPIs)
Proton Pump Inhibitors (PPIs)
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Sucralfate
Sucralfate
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Antacids
Antacids
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Misoprostol
Misoprostol
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Sympathomimetic (α2 )
Sympathomimetic (α2 )
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Anti-diarrhoeals
Anti-diarrhoeals
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Opioid agonists
Opioid agonists
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Hyoscine
Hyoscine
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Prokinetics
Prokinetics
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Metoclopramide
Metoclopramide
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Erythromycin
Erythromycin
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Acid-reducing medications
Acid-reducing medications
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Enteric Nervous System (ENS)
Enteric Nervous System (ENS)
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Acetylcholine (ACh)
Acetylcholine (ACh)
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Norepinephrine (NE)
Norepinephrine (NE)
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Cisapride
Cisapride
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Laxatives
Laxatives
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Bulk-forming laxatives
Bulk-forming laxatives
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Study Notes
Gastrointestinal Therapeutics - Part 1
- The lecture covers gastrointestinal therapeutics, specifically focusing on the pharmacological principles of treating various gastrointestinal conditions in domestic animals.
- The learning outcomes include: identifying drugs affecting gastrointestinal function, identifying drugs for treating gastrointestinal disease, examples for treating common diseases in domestic animals, and understanding the pharmacology of antiparasitic treatments.
- The equine digestive system diagram illustrates the esophagus, cecum, large colon, stomach, small intestines, small colon, and rectum.
Learning Outcomes
- State functional problems caused by gastrointestinal diseases.
- Identify drugs to modify gastrointestinal function.
- Identify drugs to treat gastrointestinal disease.
- Illustrate possible uses of drugs to treat common domestic animal diseases.
- Explain the pharmacological principles of antiparasitic treatments.
Emetics and Anti-emetics
- Vomiting (emesis) is a reflex pathway protecting animals from ingested toxins, but also linked to various medical conditions.
- The main targets for emetics/antiemetics include neurokinin-1 receptors (NK₁), serotonin receptors (5-HT), histamine-1 receptors (H₁), sympathomimetic (α₂), and dopamine receptors (D₂).
- Species differences are significant in selecting treatment agents.
- Metoclopramide, maropitant, and ondansetron are key veterinary antiemetics.
- Apomorphine and xylazine are used as emetics in dogs and cats.
Acid Blockers and Mucosal-Protectants
- Acid blockade is essential for treating esophageal and gastric ulceration and gastritis.
- Main therapeutic targets are histamine H₂ receptors and H+K+-ATPase proton pumps.
- Mucosal protectants enhance GI barrier function by creating a barrier, neutralizing acid, and boosting prostaglandin E production.
- Antacids, sucralfate, and misoprostol are frequently used.
Prokinetics and Anti-diarrhoeals
- Prokinetics increase gastrointestinal motility.
- Anti-diarrhoeals decrease motility.
- Metoclopramide, cisapride, ranitidine, erythromycin, and lidocaine are significant prokinetics.
- Loperamide and diphenoxylate are opioid antagonists reducing peristalsis.
- Hyoscine acts as an antispasmodic for equine colic.
- Kaolin-pectin formulations offer demulcent and adsorbent properties.
Laxatives
- Laxatives promote elimination or increase stool fluid content.
- They are used for constipation or before radiographic/surgical procedures.
- Bulk-forming laxatives (e.g., bran) are hydrophilic plant fibers stimulating peristalsis.
- Lubricant laxatives (e.g., liquid paraffin) coat stool, improving passage.
- Lactulose ferments in the large intestine to create an osmotic effect.
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