All Free Pharmacology MCQs with Answers
Every Pharmacology question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
476 questions · page 9 of 24
- A. Corticosteroids
- B. Adrenaline
- C. Glucose 1.V
- D. Saline 1.V
Explanation: Adrenaline is first-line treatment for anaphylactic shock because it simultaneously reverses airway constriction, mucosal edema and…
Correct answer: Adrenaline- A. Cocaine
- B. Procaine
- C. Lignocaine
- D. None of the above
Explanation: Cocaine is the naturally occurring local anaesthetic in the list and also blocks norepinephrine reuptake, producing sympathomimetic…
Correct answer: Cocaine- A. Ondansetron
- B. Metoclopramide
- C. Sodium citrate
- D. Atropine
Explanation: Metoclopramide increases lower oesophageal sphincter tone and accelerates gastric emptying, reducing reflux and the risk of aspiration.
Correct answer: Metoclopramide- A. Cardiac asthma
- B. Bronchial asthma
- C. Pulmanray oedema
- D. Cor pulmonale
Explanation: Salbutamol is a selective β2 agonist that relaxes bronchial smooth muscle, making it a bronchodilator for bronchial asthma.
Correct answer: Bronchial asthma- A. Morphine
- B. Propanolol
- C. Stropine
- D. Nitroglycerine
Explanation: Nitroglycerin is not contraindicated in bronchial asthma and may relieve associated cardiac ischaemia.
Correct answer: Nitroglycerine- A. Amphetamine
- B. Nor epinephrine
- C. Isoproterenol
- D. Phenylephrine
Explanation: Isoproterenol stimulates β2 receptors strongly and directly relaxes bronchial smooth muscle, producing marked bronchodilation.
Correct answer: Isoproterenol- A. Renal colic
- B. Organophosphorus poisoning
- C. Bronchial asthma
- D. miosisConsult Online Doctors
Explanation: Ipratropium blocks muscarinic receptors in the airways, producing bronchodilation and helping control bronchospasm in asthma and COPD.
Correct answer: Bronchial asthma- A. Albuterol
- B. Salmeterol
- C. Pirlbuterol
- D. Orciprenaline
Explanation: Salmeterol is a long-acting selective beta2 agonist used for maintenance bronchodilation.
Correct answer: Salmeterol- A. Adrenaline
- B. propranolol
- C. Atropine
- D. Salbutamol
Explanation: Propranolol blocks beta2 receptors in bronchial smooth muscle, removing bronchodilator sympathetic influence and potentially producing…
Correct answer: propranolol- A. Histamine
- B. Salbutamol
- C. Acetylcholine
- D. Serotonin
Explanation: Salbutamol is a selective beta2 agonist that relaxes bronchial smooth muscle and relieves bronchospasm.
Correct answer: Salbutamol- A. Bronchial asthma
- B. cardiac asthma
- C. Hypertension
- D. Angina pectrosis
Explanation: Beta2 stimulation relaxes bronchial smooth muscle, so beta2 agonists such as salbutamol are used for bronchial asthma.
Correct answer: Bronchial asthma- A. Epinephrine
- B. Atropine
- C. A diuretic
- D. A potent vasadilatior
Explanation: Atropine is the usual first-line drug for symptomatic bradycardia because it blocks vagal muscarinic effects on the sinoatrial and…
Correct answer: Atropine- A. Penetrate the blood brain barrier
- B. Cause euphoria
- C. Both of the above
- D. None of the above
Explanation: Some indirect sympathomimetics, especially amphetamine, cross the blood-brain barrier and increase central catecholamines, producing…
Correct answer: Both of the above- A. Blocking acetylcholine receptors
- B. Prevent release of acetyl choline
- C. Destroys acetyl choline
- D. Inactivate acetylcholine esterase enzyme
Explanation: d-Tubocurarine is a competitive, non-depolarising neuromuscular blocker that occupies nicotinic acetylcholine receptors at the motor end…
Correct answer: Blocking acetylcholine receptors- A. d-tubecurarine
- B. Acetycholine
- C. Atracurium
- D. Acetazolamide
Explanation: Atracurium undergoes organ-independent Hofmann elimination at physiological temperature and pH.
Correct answer: Atracurium- A. Atropine
- B. Neostigmine
- C. Scopalamine
- D. Ephedrine
Explanation: Neostigmine inhibits acetylcholinesterase, increasing acetylcholine at muscarinic sites and thereby stimulating salivary secretion.
Correct answer: Neostigmine- A. Organophosphate poisoning
- B. Chronic glaucoma
- C. Syncope
- D. Trigeminal neuralgia
Explanation: Atropine is a muscarinic antagonist that counteracts the excessive acetylcholine effects of organophosphates, especially bronchial…
Correct answer: Organophosphate poisoning- A. Epinephrine
- B. Succinylcholine
- C. Tetracycline
- D. Sulfonamides
Explanation: Epinephrine is used therapeutically in severe allergic reactions and anaphylaxis because it rapidly produces bronchodilation…
Correct answer: Epinephrine- A. Anticholinesterases
- B. Alpha-adrenergic blocking agents
- C. Indirect acting sympathomimetics
- D. Direct acting sympathomimetics
Explanation: Ephedrine, tyramine, and amphetamine increase adrenergic activity mainly by releasing stored noradrenaline, so they are indirect-acting…
Correct answer: Indirect acting sympathomimetics- A. Motion sickness
- B. Hypertension
- C. Decreased secretions
- D. A & C
Explanation: Scopolamine is an antimuscarinic drug that prevents motion sickness and decreases glandular secretions.
Correct answer: A & C