Cholinergic Drugs Study Notes

Chapter 21: Adrenergic Drugs
1. Objectives

  • Understand the adrenergic nervous system functions.

  • Identify drugs classified as adrenergic agonists (sympathomimetics).

  • Discuss adrenergic agonists' mechanisms of action, effects, indications, side effects, and contraindications.

  • Formulate a nursing care plan for patients on adrenergic agonists.

2. Key Terms

  • Adrenergic receptor: Receptors that respond to adrenaline and noradrenaline.

  • Catecholamines: Hormones produced by the adrenal glands (e.g., epinephrine, norepinephrine).

  • Sympathomimetics: Drugs that mimic the effects of the sympathetic nervous system.

3. Overview of Adrenergic Drugs

  • Stimulate the sympathetic nervous system and mimic actions of catecholamines.

  • Direct-acting agents bind to adrenergic receptors; indirect-acting agents promote the release or inhibit the reuptake of catecholamines.

4. Drug Profiles: Adrenergic Drugs

  • Direct-Acting Agonists: Epinephrine, norepinephrine, isoproterenol.

  • Indirect-Acting Agonists: Amphetamine, cocaine.

5. Mechanisms of Action and Effects

  • Increase heart rate, enhance myocardial contractility, bronchodilation, vasoconstriction.

  • Effects categorized based on receptor activity: alpha vs. beta.

6. Indications

  • Cardiac arrest (epinephrine), asthma (albuterol), hypotension (dopamine).

7. Contraindications

  • Known drug allergies, severe hypertension, tachyarrhythmias.

8. Adverse Effects

  • Common adverse effects: hypertension, tachycardia, anxiety.

Chapter 22: Anticholinergic Drugs
1. Objectives

  • Understand the role of the anticholinergic drugs in blocking acetylcholine.

  • Identify anticholinergic drugs and their classifications.

2. Key Terms

  • Anticholinergic: Drugs that block the action of acetylcholine at muscarinic receptors.

  • Atropine: A classic anticholinergic drug used in various medical situations.

3. Overview of Anticholinergic Drugs

  • Inhibit the parasympathetic nervous system effects.

4. Drug Profiles: Anticholinergic Drugs

  • Atropine: Used to treat bradycardia.

  • Benztropine: Used in the treatment of Parkinson's disease.

5. Mechanisms of Action and Effects

  • Decreased secretions, relaxation of smooth muscle, increased heart rate.

6. Indications

  • Respiratory conditions, pre-operative medication to reduce salivation.

7. Contraindications

  • Glaucoma, urinary obstruction.

8. Adverse Effects

  • Dry mouth, blurred vision, urinary retention.

Chapter 23: Opioid Analgesics
1. Objectives

  • Understand the role of opioid analgesics in pain management.

  • Identify classifications of opioid drugs.

2. Key Terms

  • Opioids: Substances that bind to opioid receptors to reduce pain.

3. Overview of Opioid Analgesics

  • Act primarily in the central nervous system to relieve pain.

4. Drug Profiles: Opioid Analgesics

  • Morphine: Standard for pain relief.

  • Fentanyl: Potent opioid used in severe pain.

5. Mechanisms of Action and Effects

  • Act on mu, delta, and kappa receptors; produce analgesia, euphoria, respiratory depression.

6. Indications

  • Moderate to severe pain, cough suppressants, diarrhea management.

7. Contraindications

  • Respiratory depression, known allergy to opioids.

8. Adverse Effects

-Constipation, nausea, sedation, overdose risk.

Chapter 24: NSAIDs and Antipyretics
1. Objectives

  • Understand the classifications and mechanisms of NSAIDs and antipyretics.

2. Key Terms

  • NSAIDs: Non-steroidal anti-inflammatory drugs common for pain relief.

3. Overview of NSAIDs and Antipyretics

  • Inhibit cyclooxygenase (COX) which decreases prostaglandins.

4. Drug Profiles: NSAIDs

  • Ibuprofen: Common over-the-counter NSAID.

  • Aspirin: Anti-inflammatory and antipyretic effects.

5. Mechanisms of Action and Effects

  • Reduce inflammation, pain relief, and fever reduction through inhibition of COX.

6. Indications

  • Mild to moderate pain, inflammation, and fever.

7. Contraindications

  • Peptic ulcers, renal failure, allergy.

8. Adverse Effects

  • Gastrointestinal irritation, renal impairment.

Chapter 25: Antidepressants
1. Objectives

  • Understand the classifications of antidepressant medications.

2. Key Terms

  • SSRIs: Selective serotonin reuptake inhibitors.

  • SNRIs: Serotonin-norepinephrine reuptake inhibitors.

3. Overview of Antidepressants

  • Used in managing major depressive disorder and anxiety disorders.

4. Drug Profiles: Antidepressants

  • Fluoxetine (Prozac): A common SSRI.

  • Duloxetine (Cymbalta): An SNRI used for depression and pain.

5. Mechanisms of Action and Effects

  • Increase serotonin and norepinephrine levels in the brain.

6. Indications

  • Major depressive disorder, anxiety disorders, chronic pain conditions.

7. Contraindications

  • Concurrent use with MAOIs, known allergies.

8. Adverse Effects

  • Weight gain, sexual dysfunction, gastrointestinal disturbances.