Antiemetic Drugs and Nausea/Vomiting

Proton Pump Inhibitors

• Examples: Omeprazole (Prilosec), Esomeprazole (Nexium)

• Mechanism of Action (MOA): Inhibits H+/K+ ATPase enzyme in gastric parietal cells, suppressing gastric acid production.

• Adverse Reactions and Drug Interactions: Risk of C. difficile infection, bone fractures, and hypomagnesemia; consider interactions with clopidogrel.

• Indications/Contraindications: Indicated for GERD, peptic ulcers; contraindicated in known hypersensitivity.

• Nursing Implications: Monitor for efficacy and adverse effects.

  • Monitoring Parameters: Serum magnesium levels, signs of gastrointestinal bleeding.

  • Administration Guidelines: Assess for medication interactions, usually taken before meals.

  • Teaching Points for Patient/Family Education (PFE): Educate on potential vitamin deficiencies and adherence to regimen.

• Pregnancy Category: Generally category B.

H2 Blockers

• Examples: Ranitidine (Zantac), Famotidine (Pepcid)

• Mechanism of Action (MOA): Block histamine H2 receptors on gastric parietal cells, reducing acid secretion.

• Adverse Reactions and Drug Interactions: Headaches, dizziness, rare cases of confusion; may interact with warfarin.

• Indications/Contraindications: Indicated for GERD, peptic ulcers; caution in renal impairment.

• Nursing Implications: Assess for therapeutic effectiveness and interactions.

  • Monitoring Parameters: Renal function tests, hepatic enzymes.

  • Administration Guidelines: Administer with or without food; timing may adjust depending on other medications.

  • Teaching Points for Patient/Family Education (PFE): Advise on common side effects and importance of full course.

• Pregnancy Category: Generally category B.

Antibacterial Drugs (for treating H. pylori)

• Examples: Amoxicillin, Clarithromycin, Metronidazole

• Mechanism of Action (MOA): Eradicates H. pylori through bactericidal effects.

• Adverse Reactions and Drug Interactions: Gastrointestinal disturbances; assess for concurrent antibiotic use.

• Indications/Contraindications: Indicated for H. pylori eradication; contraindicated in hypersensitivity.

• Nursing Implications: Monitor for adherence and resistance signs.

  • Monitoring Parameters: Monitor for treatment failure symptoms.

  • Administration Guidelines: Administer within established regimens, often with proton pump inhibitors.

  • Teaching Points for Patient/Family Education (PFE): Instruct on full course completion and side effects.

Mucosal Protectants

• Example: Sucralfate (Carafate)

• Mechanism of Action (MOA): Forms a protective barrier at ulcer sites.

• Adverse Reactions and Drug Interactions: Constipation; possible interactions with other medications due to absorption issues.

• Indications/Contraindications: Used for duodenal ulcers; avoid in patients with renal issues or hypersensitivity.

• Nursing Implications: Monitor bowel habits and symptom relief.

  • Monitoring Parameters: Renal function; assess for GI bleeding.

  • Administration Guidelines: Administer 1 hour before meals and at bedtime; separate from other drugs.

  • Teaching Points for Patient/Family Education (PFE): Educate on potential constipation and compliance importance.

Antacids

• Examples: Aluminum Hydroxide, Magnesium Hydroxide (Maalox), Calcium Carbonate (Tums)

• Mechanism of Action (MOA): Neutralizes gastric acid and raises gastric pH.

• Adverse Reactions and Drug Interactions: Rarely, metabolic alkalosis; may interfere with absorption of other drugs.

• Indications/Contraindications: Indicated for symptomatic relief of heartburn; caution in renal insufficiency.

• Nursing Implications: Evaluate effectiveness and potential side effects.

  • Monitoring Parameters: Monitor renal function in prolonged use.

  • Administration Guidelines: Administer between meals and before bedtime for best effect.

  • Teaching Points for Patient/Family Education (PFE): Advise on timing related to other medications.

Laxatives

• Examples: Bisacodyl (Dulcolax), Polyethylene Glycol (Miralax), Psyllium (Metamucil)

• Mechanism of Action (MOA): Increases bowel movements by various mechanisms (osmotic, stimulant).

• Adverse Reactions and Drug Interactions: Electrolyte imbalances; review potential drug interactions especially with diuretics.

• Indications/Contraindications: Indicated for constipation; contraindicated in bowel obstruction.

• Nursing Implications: Monitor bowel patterns and overall hydration status.

  • Monitoring Parameters: Electrolyte levels; signs of dehydration.

  • Administration Guidelines: Administer with plenty of fluid unless contraindicated.

  • Teaching Points for Patient/Family Education (PFE): Instruct on lifestyle changes for constipation management.

Antiemetics/Motion Sickness

• Examples: Ondansetron (Zofran), Meclizine (Antivert), Promethazine (Phenergan)

• Mechanism of Action (MOA): Various mechanisms based on drug class (blockade of receptors, affecting neurotransmitters).

• Adverse Reactions and Drug Interactions: Sedation, dry mouth; assess for drug interactions with CNS depressants.

• Indications/Contraindications: Indicated for nausea/vomiting; precautions in pregnancy and lactation.

• Nursing Implications: Monitor effectiveness and side effects.

  • Monitoring Parameters: Assess signs of sedation or adverse reactions.

  • Administration Guidelines: Administer prior to travel or as directed.

  • Teaching Points for Patient/Family Education (PFE): Inform about effective use before anticipatory nausea and side effects.

Prokinetic Agents

• Example: Metoclopramide (Reglan)

• Mechanism of Action (MOA): Enhances gastrointestinal motility; increases peristalsis.

• Adverse Reactions and Drug Interactions: Extrapyramidal symptoms; monitor for interactions with CNS medications.

• Indications/Contraindications: Indicated for gastroparesis; contraindicated in bowel obstruction.

• Nursing Implications: Monitor for therapeutic effect and side effects.

  • Monitoring Parameters: Vital signs and neurologic signs.

  • Administration Guidelines: Take 30 minutes before meals.

  • Teaching Points for Patient/Family Education (PFE): Teach about potential side effects and the effect on gastric emptying.

Antidiarrheals

• Examples: Loperamide (Imodium), Diphenoxylate with Atropine (Lomotil)

• Mechanism of Action (MOA): Reduce peristalsis; absorbent properties to thicken stool.

• Adverse Reactions and Drug Interactions: Constipation, intestinal obstruction; watch for interactions with other GI agents.

• Indications/Contraindications: Indicated for diarrhea; contraindicated in infectious diarrhea.

• Nursing Implications: Monitor bowel patterns and hydration status.

  • Monitoring Parameters: Electrolyte levels; signs of dehydration.

  • Administration Guidelines: Administer as soon as diarrhea begins; consider timing relative to food.

  • Teaching Points for Patient/Family Education (PFE): Advise on when to seek medical attention.

Drugs for Treating Obesity

Lipase Inhibitors

• Example: Orlistat (Alli, Xenical)

• Mechanism of Action (MOA): Inhibits gastric and pancreatic lipases, reducing fat absorption.

• Adverse Reactions and Drug Interactions: Oily spotting, flatulence; consider potential interactions with fat-soluble vitamins.

• Indications/Contraindications: Indicated for obesity; contraindicated in chronic malabsorption syndromes.

• Nursing Implications: Monitor weight loss and adherence to diet.

  • Monitoring Parameters: Monitor for gastrointestinal side effects and nutrient absorption.

  • Administration Guidelines: Taken with meals; educate on dietary fat restrictions.

  • Teaching Points for Patient/Family Education (PFE): Discuss the expected side effects and educate about vitamin supplementation.

Appetite Suppressants

• Examples: Phentermine (Adipex), Benzphetamine (Didrex)

• Mechanism of Action (MOA): Increases norepinephrine release; suppresses appetite.

• Adverse Reactions and Drug Interactions: Insomnia, hypertension; monitor for interactions with stimulants.

• Indications/Contraindications: Indicated for obesity; not for use with a history of cardiovascular disease.

• Nursing Implications: Regularly assess blood pressure and heart rate.

  • Monitoring Parameters: Vital signs; weight loss progress.

  • Administration Guidelines: Typically taken in the morning; avoid late doses to prevent insomnia.

  • Teaching Points for Patient/Family Education (PFE): Instruct on potential side effects and the importance of lifestyle changes.

Pancreatic Enzymes

• Example: Pancrelipase (Creon)

• Mechanism of Action (MOA): Replaces enzymes lacking in EPI to aid digestion.

• Adverse Reactions and Drug Interactions: Abdominal pain, GI discomfort; assess for interactions with antacids.

• Indications/Contraindications: Indicated for exocrine pancreatic insufficiency; caution in renal impairment.

• Nursing Implications: Monitor for compliance and effectiveness.

  • Monitoring Parameters: Signs of malnutrition and stool quality.

  • Administration Guidelines: Administer with food; do NOT crush.

  • Teaching Points for Patient/Family Education (PFE): Educate about the critical timing for administration and dietary considerations.

Gallbladder Solubilizing Agents

• Example: Ursodiol (Actigall)

• Mechanism of Action (MOA): Dissolves cholesterol gallstones over time.

• Adverse Reactions and Drug Interactions: GI upset; monitor interactions with other lipid-lowering agents.

• Indications/Contraindications: Indicated for cholesterol gallstones; contraindicated in pregnancy and certain gallstone types.

• Nursing Implications: Assess for efficacy during treatment course.

  • Monitoring Parameters: Liver function tests and for gallstone dissolution.

  • Administration Guidelines: Taken with meals; educate about diet considerations.

  • Teaching Points for Patient/Family Education (PFE): Discuss the importance of adherence and potential side effects.