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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

Which of the following is not a stimulant?

  1. Amphetamine

  2. Methylphenidate

  3. Caffeine

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

Clonidine is not a stimulant, but rather an antihypertensive.

Multiple choice

Which of the following is not an opioid?

  1. Morphine

  2. Heroin

  3. Fentanyl

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

Buprenorphine is not an opioid, but rather an opioid antagonist.

Multiple choice

Which of the following is not an anticonvulsant?

  1. Phenytoin

  2. Carbamazepine

  3. Valproate

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

Lithium is not an anticonvulsant, but rather a mood stabilizer.

Multiple choice

Which of the following is not a muscle relaxant?

  1. Baclofen

  2. Diazepam

  3. Cyclobenzaprine

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

Diazepam is not a muscle relaxant, but rather an anxiolytic.

Multiple choice

What is the primary psychoactive component of marijuana?

  1. THC

  2. CBD

  3. CBN

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

Tetrahydrocannabinol (THC) is the primary psychoactive compound in marijuana, responsible for its intoxicating effects.

Multiple choice

What is the mechanism of action of rivastigmine?

  1. Inhibits acetylcholinesterase

  2. Inhibits butyrylcholinesterase

  3. Increases the release of acetylcholine

  4. Increases the reuptake of acetylcholine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rivastigmine inhibits acetylcholinesterase, thereby increasing the levels of acetylcholine in the brain.

Multiple choice

What is the mechanism of action of memantine?

  1. Inhibits acetylcholinesterase

  2. Inhibits butyrylcholinesterase

  3. Blocks NMDA receptors

  4. Increases the release of acetylcholine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Memantine blocks NMDA receptors, thereby reducing excitotoxicity and neuronal damage.

Multiple choice

Which of the following is an immunosuppressive drug used to prevent rejection in organ transplantation?

  1. Cyclosporine

  2. Tacrolimus

  3. Azathioprine

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

Cyclosporine, tacrolimus, and azathioprine are all immunosuppressive drugs used to prevent rejection in organ transplantation.

Multiple choice

What is the mechanism of action of cyclosporine?

  1. Inhibits calcineurin

  2. Inhibits T cell activation

  3. Inhibits B cell activation

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

Cyclosporine inhibits calcineurin, a phosphatase that is essential for T cell activation.

Multiple choice

What is the mechanism of action of tacrolimus?

  1. Inhibits calcineurin

  2. Inhibits T cell activation

  3. Inhibits B cell activation

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

Tacrolimus inhibits calcineurin, a phosphatase that is essential for T cell activation.

Multiple choice

What is the mechanism of action of azathioprine?

  1. Inhibits purine synthesis

  2. Inhibits DNA synthesis

  3. Inhibits RNA synthesis

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

Azathioprine inhibits purine synthesis, which is essential for DNA and RNA synthesis.

Multiple choice

Which of the following is a contraindication to the use of azathioprine?

  1. Active infection

  2. Malignancy

  3. Pregnancy

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

Azathioprine is contraindicated in patients with active infection, malignancy, or pregnancy.

Multiple choice

Which of the following is an immunosuppressive drug used to treat autoimmune diseases?

  1. Methotrexate

  2. Leflunomide

  3. Mycophenolate mofetil

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

Methotrexate, leflunomide, and mycophenolate mofetil are all immunosuppressive drugs used to treat autoimmune diseases.

Multiple choice

What is the mechanism of action of methotrexate?

  1. Inhibits dihydrofolate reductase

  2. Inhibits purine synthesis

  3. Inhibits DNA synthesis

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

Methotrexate inhibits dihydrofolate reductase, an enzyme that is essential for DNA synthesis.

Multiple choice

What is the mechanism of action of leflunomide?

  1. Inhibits dihydroorotate dehydrogenase

  2. Inhibits purine synthesis

  3. Inhibits DNA synthesis

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

Leflunomide inhibits dihydroorotate dehydrogenase, an enzyme that is essential for pyrimidine synthesis.