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Medication Side Effects & Nursing Interventions: A High-Yield Guide to
Drug-Induced Acid-Base Imbalances
Table of Contents
1. Introduction to Drug-Induced Acid-Base Disorders
2. Medications Causing Metabolic Acidosis
Table 2.1: Drugs Causing High Anion Gap Metabolic Acidosis
o
o Table 2.2: Drugs Causing Non-Anion Gap (Hyperchloremic) Metabolic Acidosis
o Table 2.3: Drugs Causing Renal Tubular Acidosis (RTA)
3. Medications Causing Metabolic Alkalosis
Table 3.1: Drugs Causing Metabolic Alkalosis
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4. Medications Causing Respiratory Acidosis
Table 3.1: CNS Depressants and Neuromuscular Blockers
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5. Medications Causing Respiratory Alkalosis
Table 3.1: Respiratory Stimulants
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6. General Nursing Interventions for Drug-Induced Imbalances
o Table 6.1: Assessment and Monitoring Guidelines
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oTable 6.2: Priority Nursing Actions by Imbalance Type
7. Electrolyte Connections & Co-Administration Considerations
8. Patient Education for High-Risk Medications
9. Quick Reference Summary Table
1. Introduction to Drug-Induced Acid-Base Disorders
Medications can disrupt the body's delicate acid-base balance through various mechanisms. These
disorders, while sometimes mild, can become life-threatening if not recognized and managed
promptly . This guide categorizes drugs by the type of imbalance they produce, enabling the nurse to
anticipate, assess, and intervene effectively.
Key Concept: Virtually every protein in the body binds protons; changes in proton concentration
(acidosis or alkalosis) can alter protein folding and function, leading to serious clinical
consequences .
Classification Framework: Drug-induced acid-base disorders can be classified into four main
categories based on mechanism :
1. Metabolic Acidosis: From acid overload, base loss, or renal dysfunction
2. Metabolic Alkalosis: From bicarbonate excess or chloride/volume depletion
3. Respiratory Acidosis: From respiratory depression or neuromuscular impairment
4. Respiratory Alkalosis: From drug-induced hyperventilation
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2. Medications Causing Metabolic Acidosis
Metabolic acidosis from medications may result from increased acid load, impaired acid excretion,
or bicarbonate loss. It can range from mild to life-threatening (e.g., lactic acidosis from biguanides) .
Table 2.1: Drugs Causing High Anion Gap Metabolic Acidosis
Drug Category Specific Drugs Mechanism Nursing Interventions
Monitor lactate levels in at-risk
Inhibit patients (renal impairment,
Phenformin, gluconeogenesis, sepsis, shock). Hold metformin
Biguanides
Metformin increase lactic acid before contrast procedures.
production Assess for unexplained malaise,
myalgias, respiratory distress.
Monitor anion gap and osmolal
Ethanol,
Metabolism generates gap. Assess mental status.
Methanol,
Alcohols ketoacids or toxic Prepare for hemodialysis if
Ethylene
organic acids severe. Support airway and
glycol
breathing.
Medication Side Effects & Nursing Interventions: A High-Yield Guide to
Drug-Induced Acid-Base Imbalances
Table of Contents
1. Introduction to Drug-Induced Acid-Base Disorders
2. Medications Causing Metabolic Acidosis
Table 2.1: Drugs Causing High Anion Gap Metabolic Acidosis
o
o Table 2.2: Drugs Causing Non-Anion Gap (Hyperchloremic) Metabolic Acidosis
o Table 2.3: Drugs Causing Renal Tubular Acidosis (RTA)
3. Medications Causing Metabolic Alkalosis
Table 3.1: Drugs Causing Metabolic Alkalosis
o
4. Medications Causing Respiratory Acidosis
Table 3.1: CNS Depressants and Neuromuscular Blockers
o
5. Medications Causing Respiratory Alkalosis
Table 3.1: Respiratory Stimulants
o
6. General Nursing Interventions for Drug-Induced Imbalances
o Table 6.1: Assessment and Monitoring Guidelines
,2|Page
oTable 6.2: Priority Nursing Actions by Imbalance Type
7. Electrolyte Connections & Co-Administration Considerations
8. Patient Education for High-Risk Medications
9. Quick Reference Summary Table
1. Introduction to Drug-Induced Acid-Base Disorders
Medications can disrupt the body's delicate acid-base balance through various mechanisms. These
disorders, while sometimes mild, can become life-threatening if not recognized and managed
promptly . This guide categorizes drugs by the type of imbalance they produce, enabling the nurse to
anticipate, assess, and intervene effectively.
Key Concept: Virtually every protein in the body binds protons; changes in proton concentration
(acidosis or alkalosis) can alter protein folding and function, leading to serious clinical
consequences .
Classification Framework: Drug-induced acid-base disorders can be classified into four main
categories based on mechanism :
1. Metabolic Acidosis: From acid overload, base loss, or renal dysfunction
2. Metabolic Alkalosis: From bicarbonate excess or chloride/volume depletion
3. Respiratory Acidosis: From respiratory depression or neuromuscular impairment
4. Respiratory Alkalosis: From drug-induced hyperventilation
, 3|Page
2. Medications Causing Metabolic Acidosis
Metabolic acidosis from medications may result from increased acid load, impaired acid excretion,
or bicarbonate loss. It can range from mild to life-threatening (e.g., lactic acidosis from biguanides) .
Table 2.1: Drugs Causing High Anion Gap Metabolic Acidosis
Drug Category Specific Drugs Mechanism Nursing Interventions
Monitor lactate levels in at-risk
Inhibit patients (renal impairment,
Phenformin, gluconeogenesis, sepsis, shock). Hold metformin
Biguanides
Metformin increase lactic acid before contrast procedures.
production Assess for unexplained malaise,
myalgias, respiratory distress.
Monitor anion gap and osmolal
Ethanol,
Metabolism generates gap. Assess mental status.
Methanol,
Alcohols ketoacids or toxic Prepare for hemodialysis if
Ethylene
organic acids severe. Support airway and
glycol
breathing.
