Opioids: Classification and Actions
- Previous year questions on Opioids: Classification and Actions for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Pharmacology section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 30 live questions in Opioids: Classification and Actions.
- 4 of 30 questions carry a verified exam year: 2017, 2018, 2020.
- Pharmacology is worth about 20 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 6 Sept 2026.
Q1.A patient of biliary colic presented to hospital. Intern gave an injection and the pain worsened. Which is the most likely injection given?
- AMorphine✓ Correct answer
- BDiclofenac
- CNefopam
- DEtoricoxib
Q2.Buprenorphine partial agonist at which opioid receptor?
- AMu✓ Correct answer
- BKappa
- CDelta
- DLambda
Q3.Buprenorphine drug is a type of
- AMu partial agonist✓ Correct answer
- BMu agonist
- CMu partial antagonist
- DMu antagonist
Q4.All of the following are actions produced by mu receptors of morphine except:-
- AMiosis
- BDecreased GI motility
- CRespiratory depression
- DHyperalgesia✓ Correct answer
Q5.Morphine is contraindicated in all except
- AIschemic heart disease✓ Correct answer
- BAsthma
- CElderly male
- DBiliary colic
Q6.Tolerance develops to following actions of Morphine except
- AEuphoria
- BMiosis✓ Correct answer
- CNausea and vomiting
- DAnalgesia
Q7.Morphine should not be used in the treatment of:
- AIschemic pain
- BBiliary colic✓ Correct answer
- CCancer pain
- DPost operative pain
Q8.A patient presented with pain in the right lower quadrant of abdomen. He has history of renal stones in right kidney. He was prescribed an opioid which is agonist at kappa receptors and antagonist at mu receptors. The likely drug given was:
- APentazocine✓ Correct answer
- BBuprenorphine
- CTramadol
- DFentanyl
Q9.True regarding morphine –
- ATolerance develops for all except miosis and constipation✓ Correct answer
- BTolerance to all effects develops with chronic usage
- CTolerance develops for all except euphoria and sedation
- DTolerance can develop to all effects in high doses
Q10.Which of the following opioids cause the least amount of nausea?
- AFentanyl
- BSufentanil
- CAlfentanil✓ Correct answer
- DRemifentanil
Answer key
Q1: A. Morphine; Q2: A. Mu; Q3: A. Mu partial agonist; Q4: D. Hyperalgesia; Q5: A. Ischemic heart disease; Q6: B. Miosis; Q7: B. Biliary colic; Q8: A. Pentazocine; Q9: A. Tolerance develops for all except miosis and constipation; Q10: C. Alfentanil.
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