Chemistry · Biology

Pharmacology and Therapeutics

1,643 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

Which of the following drugs is a 5-HT4 receptor agonist?

  1. Prucalopride

  2. Tegaserod

  3. Mosapride

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

5-HT4 receptor agonists, such as prucalopride, tegaserod, and mosapride, work by stimulating 5-HT4 receptors in the gastrointestinal tract, thereby increasing gastrointestinal motility and secretion.

Multiple choice

What is the primary mechanism of action of opioid analgesics in the treatment of diarrhea?

  1. Inhibition of intestinal motility

  2. Absorption of water and electrolytes

  3. Killing of pathogenic bacteria

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

Opioid analgesics, such as morphine and codeine, work by inhibiting intestinal motility, thereby reducing the frequency and volume of stools.

Multiple choice

Which of the following drugs is a bile acid sequestrant?

  1. Colestipol

  2. Cholestyramine

  3. Ezetimibe

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

Bile acid sequestrants, such as colestipol, cholestyramine, and ezetimibe, work by binding to bile acids in the intestine, thereby preventing their reabsorption and increasing their excretion in the feces.

Multiple choice

What is the primary mechanism of action of HMG-CoA reductase inhibitors in the treatment of hypercholesterolemia?

  1. Inhibition of cholesterol synthesis

  2. Increase in cholesterol excretion

  3. Increase in HDL cholesterol levels

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

HMG-CoA reductase inhibitors, such as simvastatin, atorvastatin, and rosuvastatin, work by inhibiting HMG-CoA reductase, a key enzyme in the cholesterol synthesis pathway, thereby reducing cholesterol synthesis.

Multiple choice

Which of the following drugs is a fibrate?

  1. Gemfibrozil

  2. Fenofibrate

  3. Bezafibrate

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

Fibrates, such as gemfibrozil, fenofibrate, and bezafibrate, work by activating peroxisome proliferator-activated receptor alpha (PPARα), a nuclear receptor that regulates lipid metabolism, thereby increasing HDL cholesterol levels and reducing triglyceride levels.

Multiple choice

Which medication is commonly used to treat rheumatoid arthritis and suppress the overactive immune response?

  1. Antibiotics

  2. NSAIDs

  3. Disease-Modifying Anti-Rheumatic Drugs (DMARDs)

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

DMARDs are a class of medications used to treat rheumatoid arthritis by suppressing the overactive immune response and preventing joint damage.

Multiple choice

Which of the following is NOT a common type of drug delivery system?

  1. Tablets

  2. Capsules

  3. Injections

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

Implants are not a common type of drug delivery system, as they require surgical insertion and are typically used for long-term drug delivery.

Multiple choice

Which of the following is NOT a factor that can affect the bioavailability of a drug?

  1. The route of administration

  2. The formulation of the drug

  3. The presence of food in the stomach

  4. The age of the patient
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The age of the patient is not a factor that can affect the bioavailability of a drug.

Multiple choice

Which of the following is NOT a phase of a clinical trial?

  1. Phase I

  2. Phase II

  3. Phase III

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

Phase IV is not a phase of a clinical trial. Phase I trials involve a small number of healthy volunteers, Phase II trials involve a larger number of patients with the disease or condition being treated, and Phase III trials involve a large number of patients with the disease or condition being treated.

Multiple choice

Which of the following is NOT a factor that can affect the pharmacokinetics of a drug?

  1. The route of administration

  2. The formulation of the drug

  3. The presence of food in the stomach

  4. The age of the patient
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The age of the patient is not a factor that can affect the pharmacokinetics of a drug.

Multiple choice

Which of the following is NOT a type of pharmacodynamic study?

  1. In vitro studies

  2. In vivo studies

  3. Clinical trials

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

Clinical trials are not a type of pharmacodynamic study. In vitro studies are conducted in the laboratory, in vivo studies are conducted in living organisms, and animal studies are conducted in animals.

Multiple choice

What is the first-line treatment for GERD?

  1. Antacids

  2. H2 receptor antagonists

  3. Proton pump inhibitors

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

Antacids are the first-line treatment for GERD. They neutralize stomach acid and provide quick relief from symptoms.

Multiple choice

Which of the following is an H2 receptor antagonist?

  1. Cimetidine

  2. Ranitidine

  3. Famotidine

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

Cimetidine, ranitidine, and famotidine are all H2 receptor antagonists.

Multiple choice

Which of the following is a proton pump inhibitor?

  1. Omeprazole

  2. Lansoprazole

  3. Esomeprazole

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

Omeprazole, lansoprazole, and esomeprazole are all proton pump inhibitors.

Multiple choice

Which of the following is an example of an atypical antipsychotic?

  1. Chlorpromazine

  2. Haloperidol

  3. Olanzapine

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

Olanzapine is an atypical antipsychotic, while chlorpromazine and haloperidol are typical antipsychotics. Risperidone is also an atypical antipsychotic, but it is not as commonly used as olanzapine.