During drug therapy with folic acid Vitamin B₁₂ deficiency you should as nurse monitor for the following:

IGNOU PB Bsc Entrance-2023

Pharmacology

Hard

Appeared in: IGNOU PB Bsc Entrance-2023

Explanation

Folic acid administration can correct the hematological signs (megaloblastic anemia) of Vitamin B₁₂ deficiency.
However, folic acid does not correct the underlying neurological deficits, which are caused by impaired myelin synthesis.
This 'masking' of the anemia can allow for irreversible neurological damage to progress unnoticed.
Tremors are a neurological sign, indicating that the nervous system is being affected despite potential improvement in blood counts.
Therefore, monitoring for neurological changes is a critical nursing responsibility in this situation.

Option B: Vomiting is a non-specific gastrointestinal symptom and is not a characteristic sign of the progressive, masked neurological damage seen in Vitamin B₁₂ deficiency during folic acid therapy.
Option C: Fever is a systemic sign of infection or inflammation and is not directly associated with the pathophysiology of Vitamin B₁₂ deficiency or its interaction with folic acid.
Option D: While severe Vitamin B₁₂ deficiency can cause pancytopenia, including low platelets (thrombocytopenia), which increases bleeding risk, this is a hematological sign. The critical issue with folic acid therapy is the masking of neurological, not hematological, decline.

Clinical Relevance

Nursing practice connection: Knowing Masking of Vitamin B12 deficiency symptoms by folic acid therapy helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A fundamental nursing safety principle is to ensure Vitamin B₁₂ levels are assessed before initiating high-dose folic acid therapy, especially in at-risk populations (e.g., older adults, vegans, patients with malabsorption disorders).
This prevents the inadvertent masking of a B₁₂ deficiency and subsequent irreversible neurological injury.
What if? If the patient has confirmed pernicious anemia (an autoimmune cause of B₁₂ deficiency), the correct treatment is lifelong parenteral (injected) or high-dose oral Vitamin B₁₂, not just folic acid. Folic acid alone would be contraindicated as monotherapy.

How to Approach the Question

First, identify the core clinical concept: the interaction between folic acid and Vitamin B₁₂ deficiency.
Recall the distinct roles of these two vitamins. Both are needed for red blood cell production, but only Vitamin B₁₂ is essential for maintaining the myelin sheath of nerves.
Understand the 'masking' effect: Folic acid can 'fix' the anemia (a blood problem), making it seem like the patient is getting better, but it cannot fix the nerve damage.
Analyze the options to find a symptom related to nerve function.
Tremors are a neurological sign (related to nerves and muscles). Vomiting, fever, and bleeding are not primary neurological signs in this context.
Select the option that represents the uncorrected, progressive neurological damage.

Concept Tested & Keywords

Concept Tested: Masking of Vitamin B12 deficiency symptoms by folic acid therapy
Stem keywords: drug therapy, folic acid, Vitamin B₁₂ deficiency, monitor
Lead-in keywords: monitor for
Clinical cues: Patient receiving folic acid while having a Vitamin B12 deficiency, which points to a specific adverse interaction.

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 3 pp. 139-141, 138-140

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 655-657