RUHS, Jaipur, M.Sc Nursing Entrance Exam-2024
Pharmacology
Medium
Which of the psychiatric drug does not need any test dose before starting routine dose
Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2024
Explanation
- Quetiapine is an atypical antipsychotic that does not have a mandatory test dose requirement before starting.
- Treatment with Quetiapine begins with a low dose which is gradually increased (titrated) based on the patient's clinical response and how well they tolerate it.
- This process of starting low and going slow is part of its standard dosing schedule, not a specific 'test' to rule out severe, acute reactions like with other drugs.
Why Other Options Were Wrong
- Option A: Before administering the long-acting injectable (depot) form of Haloperidol, an oral trial is often conducted to 'test' the patient's tolerance and prevent severe extrapyramidal side effects from a long-lasting injection.
- Option B: An oral 'test' period is required before starting the long-acting injectable form of Risperidone (e.g., Risperdal Consta). The oral medication is continued for the first few weeks after the initial injection to ensure the patient tolerates the drug and to maintain therapeutic blood levels.
- Option C: Clozapine has a strict, mandatory test dose. Treatment must start with a very low dose (12.5 mg) to screen for potentially life-threatening adverse effects like severe orthostatic hypotension, bradycardia, and syncope before any titration.
Related Visual
Clinical Relevance
- Nursing practice connection: Safe nursing care depends on performing Test dose and initiation protocols for antipsychotic medications in the correct sequence, documenting the action clearly, and monitoring for the expected response.
- Understanding drug initiation protocols is a critical nursing responsibility for patient safety. Administering a drug like Clozapine without the proper test dose and monitoring can lead to severe cardiovascular collapse.
- Nurses must be vigilant in monitoring for adverse effects during the initiation phase of any antipsychotic, including vital signs for Clozapine and movement disorders for Haloperidol.
- What if? If a patient develops severe dizziness and a drop in blood pressure after the first 12.5 mg dose of Clozapine, the nurse's priority is to ensure patient safety (e.g., have them lie down), notify the prescriber immediately, and document the reaction. The next dose would be held pending physician orders.
How to Approach the Question
- First, identify the core of the question: it's asking for the exception among the options.
- The keywords are 'does not need' and 'test dose'. This means three of the drugs likely have a test dose requirement, and one does not.
- Recall the specific initiation protocols for common antipsychotics.
- Consider Clozapine, known for its high risk and strict protocols, making a test dose very likely.
- Think about long-acting injectables (depot) like those for Haloperidol and Risperidone. A common safety step is an oral trial first.
- Evaluate Quetiapine. While it's started at a low dose, this is standard titration, not a specific 'test' for acute, severe reactions in the same way as the others.
Concept Tested & Keywords
- Concept Tested: Test dose and initiation protocols for antipsychotic medications.
- Stem keywords: psychiatric drug, test dose, routine dose
- Lead-in keywords: does not need
- Negative lead-in flag: The question asks which drug does NOT require a test dose.
Question ID
QTsNahqH2ECXv5xqY99uLS
Reference Book
E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) pp. 5068-5070, 9993-9995
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