Chemistry ยท Biology

Pharmacology and Therapeutics

1,699 Questions

Engage with critical pharmacology and therapeutics questions covering drug classifications and therapeutic mechanisms. Topics include chemical absorption, medication formulations, and pharmacogenomics. This collection is useful for students preparing for medical entrance, nursing, and science competitive examinations.

Chemical absorption routesDrug formulation typesMedication mechanismsEnzyme inhibitorsPharmacogenomic tests

Pharmacology and Therapeutics Questions

Multiple choice

How many grams of NaCl are needed to prepare 500 mL of a 0.9% NaCl solution?

  1. 0.45 g

  2. 4.5 g

  3. 45 g

  4. 450 g
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mass of NaCl = (Concentration % / 100) * Volume of solution = (0.9% / 100) * 500 mL = 4.5 g

Multiple choice

What is the volume of a 10% dextrose solution needed to deliver 50 g of dextrose?

  1. 250 mL

  2. 500 mL

  3. 750 mL

  4. 1000 mL
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volume of solution = (Mass of solute / Concentration %) * 100 = (50 g / 10%) * 100 = 500 mL

Multiple choice

Which of the following is a solid dosage form?

  1. Tablet

  2. Capsule

  3. Suspension

  4. Solution
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tablets are solid dosage forms that are typically swallowed whole.

Multiple choice

Which of the following is a controlled-release dosage form?

  1. Tablet

  2. Capsule

  3. Sustained-release tablet

  4. Solution
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sustained-release tablets are controlled-release dosage forms that release the drug slowly over a period of time.

Multiple choice

Which of these is a common ingredient in energy drinks that can have stimulant effects?

  1. Taurine

  2. Guarana

  3. Ginseng

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Taurine, guarana, and ginseng are all ingredients commonly found in energy drinks that can have stimulant effects.

Multiple choice

Which of the following is NOT a major class of drugs used to treat hypertension?

  1. ACE inhibitors

  2. Beta-blockers

  3. Calcium channel blockers

  4. Antidepressants
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Antidepressants are not typically used to treat hypertension.

Multiple choice

What is the mechanism of action of NSAIDs?

  1. Inhibition of COX-1 and COX-2 enzymes

  2. Inhibition of phosphodiesterase enzymes

  3. Activation of alpha-adrenergic receptors

  4. Blockade of sodium channels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NSAIDs inhibit the COX-1 and COX-2 enzymes, which are responsible for the production of prostaglandins.

Multiple choice

Which of the following drugs is primarily metabolized by the liver?

  1. Warfarin

  2. Digoxin

  3. Insulin

  4. Epinephrine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Warfarin is primarily metabolized by the liver.

Multiple choice

What is the term for the time it takes for a drug to reach its peak concentration in the blood?

  1. Half-life

  2. Onset of action

  3. Time to maximum concentration

  4. Duration of action
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The time it takes for a drug to reach its peak concentration in the blood is called the time to maximum concentration.

Multiple choice

What is the mechanism of action of statins?

  1. Inhibition of HMG-CoA reductase

  2. Inhibition of phosphodiesterase enzymes

  3. Activation of alpha-adrenergic receptors

  4. Blockade of sodium channels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statins inhibit the HMG-CoA reductase enzyme, which is involved in the production of cholesterol.

Multiple choice

Which of the following drugs is a commonly used antihistamine?

  1. Diphenhydramine

  2. Acetaminophen

  3. Omeprazole

  4. Salmeterol
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Diphenhydramine is a commonly used antihistamine.

Multiple choice

What is the term for the process by which a drug is eliminated from the body?

  1. Absorption

  2. Distribution

  3. Metabolism

  4. Excretion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The process by which a drug is eliminated from the body is called excretion.

Multiple choice

What is the mechanism of action of ACE inhibitors?

  1. Inhibition of COX-1 and COX-2 enzymes

  2. Inhibition of phosphodiesterase enzymes

  3. Inhibition of angiotensin-converting enzyme

  4. Blockade of sodium channels
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

ACE inhibitors inhibit the angiotensin-converting enzyme, which is involved in the production of angiotensin II.

Multiple choice

Which of the following drugs is a commonly used anticonvulsant?

  1. Phenytoin

  2. Metformin

  3. Ibuprofen

  4. Salmeterol
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phenytoin is a commonly used anticonvulsant.

Multiple choice

What is the term for the lowest dose of a drug that produces a therapeutic effect?

  1. Minimum effective dose

  2. Maximum tolerated dose

  3. Therapeutic index

  4. Median effective dose
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The lowest dose of a drug that produces a therapeutic effect is called the minimum effective dose.