Which of the following side effects commonly occurs with atypical antipsychotics?

NORCERT 8 Mains-2025

Pharmacology

Easy

Appeared in: NORCERT 8 Mains-2025

Explanation

Atypical (second-generation) antipsychotics are strongly associated with metabolic side effects, with weight gain being one of the most common and clinically significant.
This effect is primarily mediated through the blockade of histamine H1 and serotonin 5-HT2C receptors, which play a key role in regulating appetite and satiety.
Specific agents like clozapine and olanzapine are known to have the highest risk of causing substantial weight gain.
Weight gain is a major concern as it contributes to the development of other serious conditions like type 2 diabetes, hypertension, and cardiovascular disease, and is a frequent cause of medication non-adherence.

Option A: This is the opposite of a potential side effect. Certain antipsychotics (like risperidone) can cause hyperprolactinemia, which suppresses estrogen and testosterone. Over the long term, this can lead to decreased bone mineral density and an increased risk of osteoporosis.
Option B: This is incorrect. Atypical antipsychotics are known to impair glucose metabolism, cause insulin resistance, and increase the risk of developing new-onset type 2 diabetes mellitus. This is a key component of the metabolic syndrome associated with these drugs.
Option C: While extrapyramidal symptoms (EPS) like tremors, rigidity, and restlessness can occur with atypical antipsychotics, their incidence is significantly lower compared to typical (first-generation) antipsychotics. A lower risk of EPS is a defining advantage of the atypical class, making metabolic side effects the more common concern.

Visual 1: Table - A comparison table showing the side effect profiles of typical (first-generation) versus atypical (second-generation) antipsychotics. This helps differentiate the primary risks, highlighting EPS for typicals and metabolic syndrome for atypicals.
Visual 2: Infographic - An infographic illustrating the components of metabolic syndrome (central obesity, high blood pressure, high blood sugar, abnormal cholesterol/triglycerides) and its link to atypical antipsychotics.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Common side effects of atypical antipsychotics as background academic context rather than a clinical decision trigger.
Nurses have a critical role in monitoring patients on atypical antipsychotics for metabolic changes. This includes obtaining baseline weight, waist circumference, blood pressure, fasting glucose, and a lipid panel, with regular follow-up assessments.
Patient education is a key nursing responsibility. This involves teaching patients and their families about the risk of weight gain, encouraging healthy lifestyle choices (diet and exercise), and explaining the signs of hyperglycemia (e.g., polyuria, polydipsia, polyphagia).
What if? If a patient on olanzapine gains more than 7% of their initial body weight within the first few months, the nurse must report this to the prescriber. This significant weight gain may warrant a medication change to an agent with a lower metabolic risk, such as aripiprazole or ziprasidone, to prevent long-term complications.

How to Approach the Question

First, identify the key terms in the question: 'common side effect' and 'atypical antipsychotics'.
Recall the two main classes of antipsychotics: typical (first-generation) and atypical (second-generation).
Differentiate their hallmark side effect profiles. Remember that typicals are primarily associated with extrapyramidal symptoms (EPS), while atypicals are primarily associated with metabolic syndrome.
Evaluate the options based on this core distinction. 'Increased weight' is a central feature of metabolic syndrome.
Eliminate 'Extrapyramidal symptoms' as it is the classic side effect of the other drug class (typicals).
Eliminate 'Improved glucose metabolism' and 'Increased bone density' as they are the opposite of the known adverse effects of atypical antipsychotics.

Concept Tested & Keywords

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