The most common adverse effect of chemotherapeutic drugs is?

Daman & Diu Staff Nurse - 2018

Pharmacology

Easy

Appeared in: Daman & Diu Staff Nurse - 2018

Explanation

Nausea and vomiting are the most frequently reported adverse effects of chemotherapy, affecting a high percentage of patients.
This reaction is caused by chemotherapy agents activating the chemoreceptor trigger zone (CTZ) in the brain and stimulating serotonin release from the gastrointestinal tract, both of which trigger the vomiting reflex.
The likelihood of emesis (vomiting) is so high with certain drugs (e.g., cisplatin) that preventative antiemetic medication is a standard part of the treatment protocol.
While other side effects like mucositis, diarrhea, and constipation are common, they do not occur with the same frequency across the broad range of chemotherapy agents as nausea and vomiting.

Option A: Constipation is a known side effect of certain chemotherapy drugs, particularly vinca alkaloids, but it is not the most common adverse effect overall.
Option B: Diarrhea is a significant and common side effect of specific agents like irinotecan and 5-fluorouracil, but it is less frequent across all chemotherapy types compared to nausea and vomiting.
Option D: Painful mouth sores (stomatitis or mucositis) are a distressing side effect caused by damage to the rapidly dividing cells of the oral mucosa. However, its overall incidence is lower than that of nausea and vomiting.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Common adverse effects of chemotherapy as background academic context rather than a clinical decision trigger.
Proactive management of Chemotherapy-Induced Nausea and Vomiting (CINV) with antiemetic drugs is a critical nursing responsibility to enhance patient comfort, prevent complications, and ensure adherence to the treatment plan.
Uncontrolled CINV can lead to serious consequences such as dehydration, electrolyte imbalances, and malnutrition, which may necessitate hospitalization and interruption of cancer treatment.
What if? If a patient is receiving a chemotherapy drug with a low emetogenic potential (e.g., vincristine), the nursing care plan would prioritize monitoring for neurotoxicity and constipation over aggressive antiemetic therapy.

How to Approach the Question

First, identify the key term in the question: 'most common'. This directs you to find the adverse effect with the highest frequency.
Recall the general side effects of chemotherapy. These drugs target rapidly dividing cells, which include cancer cells but also healthy cells in the bone marrow, hair follicles, and gastrointestinal (GI) tract.
Consider the options in the context of the GI tract. Nausea, vomiting, diarrhea, constipation, and mouth sores are all related to GI toxicity.
Evaluate the frequency of each option. Nausea and vomiting are almost universally associated with many chemotherapy regimens and affect a very high percentage of patients.
Differentiate between 'most common' and 'most serious' or 'dose-limiting'. While myelosuppression (bone marrow suppression) is often the most serious dose-limiting toxicity, nausea and vomiting are the most common patient-reported side effects.

Concept Tested & Keywords

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