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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

What is the main mechanism of action of statins in lowering cholesterol levels?

  1. Increasing bile acid production

  2. Inhibiting cholesterol absorption

  3. Blocking angiotensin-converting enzyme

  4. Stimulating beta-adrenergic receptors
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Statins are a class of drugs that are used to lower cholesterol levels. They work by inhibiting the enzyme HMG-CoA reductase, which is involved in the synthesis of cholesterol in the liver. By reducing cholesterol synthesis, statins help to lower LDL (bad) cholesterol and increase HDL (good) cholesterol.

Multiple choice

Which drug class is primarily used to treat type 2 diabetes by increasing insulin sensitivity and reducing blood glucose levels?

  1. Sulfonylureas

  2. Metformin

  3. Thiazolidinediones

  4. Alpha-glucosidase inhibitors
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Metformin is a drug that is used to treat type 2 diabetes. It works by increasing insulin sensitivity and reducing the production of glucose by the liver. Metformin also helps to improve glucose uptake and utilization by muscle cells.

Multiple choice

Which drug class is commonly used to treat asthma and chronic obstructive pulmonary disease (COPD) by relaxing airway smooth muscles?

  1. Beta-agonists

  2. Anticholinergics

  3. Leukotriene modifiers

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

Beta-agonists are a class of drugs that are used to treat asthma and COPD. They work by stimulating beta-adrenergic receptors in the airways, which leads to relaxation of airway smooth muscles and bronchodilation.

Multiple choice

What is the main mechanism of action of nonsteroidal anti-inflammatory drugs (NSAIDs) in reducing inflammation and pain?

  1. Inhibiting cyclooxygenase enzymes

  2. Blocking histamine receptors

  3. Stimulating dopamine receptors

  4. Increasing serotonin levels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NSAIDs are a class of drugs that are used to reduce inflammation and pain. They work by inhibiting cyclooxygenase enzymes, which are involved in the production of prostaglandins. Prostaglandins are inflammatory mediators that contribute to pain, swelling, and fever.

Multiple choice

Which drug class is primarily used to treat hypertension by blocking the renin-angiotensin-aldosterone system?

  1. ACE inhibitors

  2. Angiotensin II receptor blockers

  3. Beta-blockers

  4. Calcium channel blockers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

ACE inhibitors are a class of drugs that are used to treat hypertension. They work by inhibiting angiotensin-converting enzyme (ACE), which is involved in the conversion of angiotensin I to angiotensin II. Angiotensin II is a potent vasoconstrictor that increases blood pressure.

Multiple choice

What is the primary mechanism of action of antihistamines in treating allergic reactions?

  1. Blocking histamine receptors

  2. Stimulating beta-adrenergic receptors

  3. Inhibiting cyclooxygenase enzymes

  4. Increasing serotonin levels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antihistamines are a class of drugs that are used to treat allergic reactions. They work by blocking histamine receptors, which are involved in the allergic response. Histamine is a chemical that is released by mast cells and basophils during an allergic reaction. It causes symptoms such as sneezing, runny nose, itchy eyes, and hives.

Multiple choice

What is the primary mechanism of action of antiviral drugs in treating viral infections?

  1. Inhibiting viral replication

  2. Stimulating the immune system

  3. Blocking histamine receptors

  4. Increasing serotonin levels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antiviral drugs are a class of drugs that are used to treat viral infections. They work by inhibiting viral replication, either by preventing the virus from entering cells, blocking viral replication enzymes, or interfering with the assembly of new viruses.

Multiple choice

Which drug class is commonly used to treat cancer by interfering with cell division and growth?

  1. Chemotherapy agents

  2. Targeted therapy drugs

  3. Immunotherapy drugs

  4. Hormonal therapy drugs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chemotherapy agents are a class of drugs that are used to treat cancer. They work by interfering with cell division and growth. Chemotherapy agents can be used alone or in combination with other treatments, such as surgery, radiation therapy, and targeted therapy.

Multiple choice

What is the treatment for occupational asthma?

  1. Avoidance of the trigger

  2. Medication

  3. Surgery

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

The treatment for occupational asthma includes avoidance of the trigger, medication, and surgery.

Multiple choice

What is the treatment for occupational lung diseases?

  1. Avoidance of the trigger

  2. Medication

  3. Surgery

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

The treatment for occupational lung diseases includes avoidance of the trigger, medication, and surgery.

Multiple choice

What is the name of the gene that encodes the mu-opioid receptor?

  1. OPRM1

  2. OPRM2

  3. OPRM3

  4. OPRM4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The gene that encodes the mu-opioid receptor is OPRM1 (opioid receptor mu 1 gene). Variations in OPRM1 have been associated with differences in opioid sensitivity and have been implicated in substance abuse and addiction.

Multiple choice

What is the term used to describe the practice of using laxatives or diuretics to lose weight?

  1. Laxative abuse

  2. Diuretic abuse

  3. Weight-loss pill abuse

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

Laxative abuse, diuretic abuse, and weight-loss pill abuse all refer to the practice of using laxatives, diuretics, or weight-loss pills to lose weight.

Multiple choice

Which targeted therapy drug is commonly used to treat chronic myeloid leukemia?

  1. Imatinib

  2. Trastuzumab

  3. Rituximab

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

Imatinib is a targeted therapy drug specifically designed to inhibit the BCR-ABL tyrosine kinase, which is commonly found in chronic myeloid leukemia.

Multiple choice

What is the mechanism of action of phototherapy in the treatment of neonatal jaundice?

  1. Converts bilirubin to a water-soluble form

  2. Inhibits bilirubin production

  3. Increases bilirubin excretion

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

Phototherapy converts bilirubin to a water-soluble form, allowing it to be excreted in the urine and feces.

Multiple choice

Which of the following is a method for detecting adverse drug reactions (ADRs)?

  1. Spontaneous reporting

  2. Clinical trials

  3. Electronic health records (EHRs)

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

ADRs can be detected through various methods, including spontaneous reporting by healthcare professionals and patients, clinical trials, and data analysis from electronic health records.