Free Central Nervous System Drugs MCQs with Answers
107 Central Nervous System Drugs MCQs from Pharmacology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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- A. Valproic acid.
- B. Carbamazepine.
- C. Ethosuximide.
- D. Phenytoin
Explanation: Long-term phenytoin therapy may cause gingival hyperplasia, hirsutism, coarse facial features, and vitamin-D-related osteomalacia.
Correct answer: Phenytoin- A. Phenobarbital.
- B. Meprobamate
- C. Chlordiazepoxide
- D. Triazolam
- E. Zolpidum
Explanation: Phenobarbital induces hepatic microsomal enzymes, increasing the metabolism of warfarin and other drugs and potentially reducing their…
Correct answer: Phenobarbital.- A. Zolpidem
- B. Buspiron.
- C. Midazolam
- D. Triazolam
- E. Phenobarbital
Explanation: Buspirone is a non-sedating anxiolytic used specifically for long-term treatment of generalized anxiety disorder.
Correct answer: Buspiron.- A. Cough suppression
- B. Anti-emesis
- C. Miosis
- D. Truncal rigidityPain Management
Explanation: Opioids commonly cause nausea and vomiting rather than anti-emesis, although they do produce cough suppression, miosis, and sometimes…
Correct answer: Anti-emesis- A. Natrexone
- B. Nalbuphine
- C. Butorphanol
- D. Pentazonice
Explanation: Naltrexone, misspelled in the options as “Natrexone,” is a pure opioid receptor antagonist.
Correct answer: Natrexone- A. Zolmitriptan
- B. Zileuton
- C. Zolpiden
- D. Zalcitabine
Explanation: Zolpidem is a short-acting non-benzodiazepine sedative-hypnotic used for insomnia.
Correct answer: Zolpiden- A. Alprazolam
- B. Diazepam
- C. Buspiron
- D. Phenobarbital
Explanation: Buspirone relieves generalized anxiety through serotonin 5-HT1A mechanisms and does not act directly on the GABAergic system.
Correct answer: Buspiron- A. Aspirin
- B. Phenytoin
- C. Chloromphenicol
- D. Cyclosporine
Explanation: Long-term phenytoin therapy can impair folate absorption or metabolism, producing folic acid deficiency and sometimes megaloblastic…
Correct answer: Phenytoin9. A Hemophiliac patient has rheumatold arthritis. Which drug might be prescribed to relieve the pain ?
- A. Acetaminophen
- B. Acetylsalicylic acid
- C. Phenylbutazone
- D. NaproxenConsult Online Doctors
Explanation: Acetaminophen provides analgesia without significantly inhibiting platelet function, making it safer in a hemophiliac than aspirin or…
Correct answer: Acetaminophen10. Activation of which of the following receptors would be expected to decrease anxiety_____________?
- A. Nicotinic cholinergic receptors
- B. Glutamate receptors
- C. GABA receptors
- D. Glucocorticoid receptors
Explanation: GABA receptor activation increases inhibitory neurotransmission in the brain, reducing neuronal excitability and anxiety.
Correct answer: GABA receptors- A. patients having fever
- B. patients having asthma
- C. patients having amoebic dysentery
- D. Patient having bronchitisGet Study Guides
Explanation: Ibuprofen can precipitate bronchospasm in patients with aspirin-sensitive asthma because cyclooxygenase inhibition shunts arachidonic acid…
Correct answer: patients having asthma- A. 1 ml / min
- B. 2.5 ml / min
- C. 1 mg / min
- D. 2.5 mg / min
Explanation: Intravenous diazepam should be administered slowly, commonly at no more than about 1 mL per minute, to reduce respiratory and…
Correct answer: 1 ml / min- A. 1 min
- B. 2 min
- C. 3-5 min
- D. 10 minBook Pain Specialists
Explanation: Succinylcholine has an ultra-short action because it is rapidly hydrolysed by plasma pseudocholinesterase, with muscle relaxation usually…
Correct answer: 3-5 min- A. Peptic ulcer
- B. Person suffering form chicken pox or small pox
- C. Hemorrhage
- D. All of the above
Explanation: Aspirin increases gastrointestinal bleeding and is contraindicated in peptic ulcer disease or active haemorrhage; it should also be…
Correct answer: All of the above- A. codeine
- B. Methadone
- C. Alphaprodine
- D. Pentazocine
Explanation: Methadone is a long-acting opioid used for opioid-substitution treatment because it prevents withdrawal and reduces craving without the…
Correct answer: Methadone- A. Contraindicated
- B. Low safety
- C. Can be used safely
- D. Not much useTry Prep Courses
Explanation: Barbiturates have a narrow therapeutic index, so respiratory depression and excessive sedation make them relatively low-safety drugs in…
Correct answer: Low safety- A. Meprobamate
- B. Pentobarbital
- C. Trimethadione
- D. Phenytoin
Explanation: Phenytoin is a classic treatment for generalized tonic-clonic, or grand mal, seizures because it limits sustained high-frequency neuronal…
Correct answer: Phenytoin- A. Antibiotics
- B. Salicylates
- C. Barbiturates
- D. Phenothiazines
Explanation: Phenothiazines block dopamine D2 receptors in the nigrostriatal pathway, causing extrapyramidal symptoms such as dystonia, akathisia and…
Correct answer: Phenothiazines- A. Folic acid deficiency
- B. Alzhiemer's disease
- C. Cushing's syndrome
- D. Vitamin C deficiencyConsult Online Doctors
Explanation: Phenytoin increases folate metabolism and can reduce folic acid levels during long-term treatment, sometimes causing megaloblastic…
Correct answer: Folic acid deficiency- A. D-tubocurarin
- B. Diazepam
- C. Beclofen
- D. Mephensin
Explanation: D-tubocurarine produces skeletal muscle relaxation by blocking nicotinic receptors at the neuromuscular junction, which is a peripheral…
Correct answer: D-tubocurarinCentral Nervous System Drugs MCQs: common questions
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