Pharmacology Quiz: Glucocorticoids
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GlucocorticoidsQuestion 1 of 20

A patient treated with oral prednisone and naproxen for a rheumatoid arthritis flare develops epigastric pain. Endoscopy reveals a gastric ulcer. The synergistic risk of peptic ulcer disease with combined glucocorticoid and NSAID use is primarily due to:

glucocorticoids increasing gastric acid secretion while NSAIDs decrease bicarbonate production.
NSAIDs causing direct mucosal injury and glucocorticoids impairing platelet aggregation.
glucocorticoids causing delayed gastric emptying, prolonging mucosal exposure to NSAIDs.
both agents impairing mucosal defense mechanisms through the inhibition of prostaglandin synthesis.
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Pharmacology Quiz

Pharmacology Quiz: Glucocorticoids

Practice Glucocorticoids in Pharmacology with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Glucocorticoids, giving you a quick way to practice the rules, question types, and explanations that matter most for Pharmacology.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

A patient treated with oral prednisone and naproxen for a rheumatoid arthritis flare develops epigastric pain. Endoscopy reveals a gastric ulcer. The synergistic risk of peptic ulcer disease with combined glucocorticoid and NSAID use is primarily due to:

  1. glucocorticoids increasing gastric acid secretion while NSAIDs decrease bicarbonate production.
  2. NSAIDs causing direct mucosal injury and glucocorticoids impairing platelet aggregation.
  3. glucocorticoids causing delayed gastric emptying, prolonging mucosal exposure to NSAIDs.
  4. both agents impairing mucosal defense mechanisms through the inhibition of prostaglandin synthesis. (correct answer)
Explanation: When you encounter questions about drug combinations causing GI toxicity, focus on how different medications can work together to overwhelm the stomach's natural protective mechanisms. Both glucocorticoids and NSAIDs independently increase peptic ulcer risk by impairing mucosal defense, but through slightly different pathways. NSAIDs like naproxen block cyclooxygenase (COX) enzymes, which dramatically reduces protective prostaglandin E₂ (PGE₂) synthesis. PGE₂ normally stimulates mucus and bicarbonate production while promoting mucosal blood flow. Glucocorticoids also suppress prostaglandin synthesis, but additionally impair other mucosal defense mechanisms including cellular repair and immune responses. When combined, these drugs create a synergistic effect—the total damage exceeds what you'd expect from simply adding their individual effects. Option A incorrectly suggests glucocorticoids directly increase acid secretion, but their primary ulcerogenic effect is through mucosal defense impairment, not acid hypersecretion. Option B wrongly attributes platelet aggregation impairment to glucocorticoids—this is actually an NSAID effect through COX-1 inhibition, and while NSAIDs do cause direct mucosal injury, this misses the key prostaglandin connection. Option C about delayed gastric emptying is not a significant mechanism for either drug class in ulcer formation. The correct answer is D because both drug classes ultimately converge on the same critical pathway: prostaglandin synthesis inhibition, which devastates the stomach's ability to protect itself. Remember: when you see combination GI toxicity questions, look for shared mechanisms rather than completely different pathways—drugs often synergize by hitting the same protective system from multiple angles.

Question 2

A key molecular action of the activated glucocorticoid receptor (GR) is transrepression, where it decreases the synthesis of inflammatory proteins. This is mechanistically distinct from transactivation. Which of the following describes a primary mechanism of transrepression by the GR?

  1. The GR binds to a glucocorticoid response element (GRE) on DNA to block RNA polymerase.
  2. The GR acts as a histone methyltransferase to induce a repressive chromatin state.
  3. The GR dimerizes and activates the transcription of repressor proteins like IκB-α.
  4. The GR directly binds to and sequesters pro-inflammatory transcription factors like AP-1 and NF-κB. (correct answer)
Explanation: When you encounter questions about glucocorticoid receptor mechanisms, focus on distinguishing between transactivation (turning genes on) and transrepression (turning genes off). These represent fundamentally different molecular pathways for how steroids exert their effects. Transrepression occurs when the activated glucocorticoid receptor directly interferes with pro-inflammatory transcription factors rather than binding to DNA itself. The GR physically binds to and sequesters key inflammatory mediators like AP-1 and NF-κB, preventing them from activating their target genes. This protein-protein interaction effectively "ties up" these transcription factors, blocking the synthesis of inflammatory cytokines, chemokines, and other pro-inflammatory proteins. This mechanism explains why glucocorticoids are such potent anti-inflammatory drugs. Choice A describes transactivation, not transrepression - this is when GR binds to glucocorticoid response elements to activate gene transcription. Choice B incorrectly assigns histone methyltransferase activity to the GR; while chromatin modification is important in gene regulation, the GR doesn't function as this type of enzyme. Choice C describes a form of transactivation where the GR would activate genes encoding repressor proteins like IκB-α, which is actually how some anti-inflammatory effects occur, but this isn't the primary transrepression mechanism being asked about. Remember that transrepression is about direct protein-protein interactions that sequester transcription factors, while transactivation involves DNA binding and gene activation. This distinction is crucial for understanding how glucocorticoids can simultaneously suppress inflammatory genes and activate metabolic genes.

Question 3

A patient who was on 60 mg of prednisone daily for 3 months for giant cell arteritis is tapered to 5 mg daily. She now presents with diffuse muscle and joint pain, fatigue, and orthostatic hypotension. Laboratory results show hyponatremia and hyperkalemia. This clinical picture is most consistent with:

  1. an unmasked secondary adrenal insufficiency. (correct answer)
  2. the onset of steroid-induced Cushing's syndrome.
  3. a severe flare of the underlying giant cell arteritis.
  4. a mineralocorticoid-excess state due to the taper.
Explanation: When you encounter a patient who's been on high-dose corticosteroids for months and develops new symptoms after tapering, always consider adrenal suppression. Prolonged exogenous steroid use suppresses the hypothalamic-pituitary-adrenal (HPA) axis, preventing normal cortisol production. This patient's presentation is classic for secondary adrenal insufficiency. The muscle/joint pain, fatigue, and orthostatic hypotension reflect cortisol deficiency, while hyponatremia and hyperkalemia indicate inadequate mineralocorticoid activity. After 3 months of high-dose prednisone, her adrenal glands stopped producing cortisol. The rapid taper from 60mg to 5mg didn't allow sufficient time for HPA axis recovery, unmasking the underlying adrenal insufficiency. Choice B (steroid-induced Cushing's syndrome) would present with weight gain, moon facies, and hypertension—opposite of this patient's symptoms. Choice C (giant cell arteritis flare) might cause muscle pain but wouldn't explain the electrolyte abnormalities or orthostatic hypotension. Choice D (mineralocorticoid excess) would cause hypertension, hypokalemia, and hypernatremia—again, the opposite of what we see. The key study tip: Remember that any patient on supraphysiologic steroids (>7.5mg prednisone equivalent) for more than 2-3 weeks risks HPA suppression. Watch for the triad of fatigue, hypotension, and electrolyte disturbances (low sodium, high potassium) when steroids are tapered too quickly. This requires either slower tapering or temporary increase in steroid dose.

Question 4

A 30-year-old male with ulcerative colitis is treated with high-dose oral methylprednisolone. After two weeks, he complains of proximal muscle weakness, making it difficult to climb stairs. A serum creatine kinase (CK) level is normal. This finding is most consistent with which glucocorticoid-induced adverse effect?

  1. Rhabdomyolysis
  2. Hypokalemic myopathy
  3. Acute inflammatory myositis
  4. Steroid-induced myopathy (correct answer)
Explanation: Steroid-induced myopathy is a well-known adverse effect of glucocorticoids, particularly potent fluorinated steroids. It characteristically presents as painless proximal muscle weakness. The underlying mechanism is primarily protein catabolism, leading to atrophy of type IIb muscle fibers. Unlike inflammatory myopathies or rhabdomyolysis, muscle enzyme levels like CK are typically normal or only mildly elevated.

Question 5

A 25-year-old patient with asthma uses a high-dose inhaled corticosteroid (fluticasone) daily. She presents with a white, curd-like coating on her tongue and buccal mucosa that can be scraped off, revealing an erythematous base. This complication is a direct result of:

  1. localized immunosuppression in the oropharynx promoting fungal overgrowth. (correct answer)
  2. a drug-induced hypersensitivity reaction of the oral mucosa.
  3. systemic immunosuppression leading to an opportunistic viral infection.
  4. atrophy of the oral mucosa due to the anti-proliferative effects of the steroid.
Explanation: When you encounter oral lesions in patients using inhaled corticosteroids, think about the local effects of these medications in the oropharynx. The white, curd-like coating that scrapes off to reveal red tissue beneath is classic for oral thrush (candidiasis). Inhaled corticosteroids like fluticasone work by suppressing local inflammatory responses in the airways. However, when these drugs deposit in the mouth and throat during inhalation, they create localized immunosuppression in the oropharynx. This suppresses the normal immune surveillance that keeps opportunistic fungi like Candida albicans in check, allowing fungal overgrowth and the characteristic thrush presentation. This makes option A correct. Option B is wrong because this isn't a hypersensitivity reaction—there's no immune system overactivity here. The lesions are infectious, not allergic. Option C incorrectly suggests systemic immunosuppression and viral infection. High-dose inhaled corticosteroids primarily cause local effects, and the described lesions are fungal (candidiasis), not viral. Option D misidentifies the mechanism—while corticosteroids can affect cell proliferation, the white coating isn't mucosal atrophy but rather fungal overgrowth on top of inflamed tissue. Remember that inhaled corticosteroids commonly cause oral thrush through local immunosuppression, which is why patients should rinse their mouths after each use. On pharmacology exams, connect medication side effects to their mechanisms of action—corticosteroids suppress immunity, so think about what infections might occur when that protection is reduced.

Question 6

A patient is administered a high dose of intravenous hydrocortisone for septic shock. A key anti-inflammatory mechanism that contributes to vascular stabilization in this acute setting is the inhibition of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression. How do glucocorticoids primarily accomplish this effect?

  1. By directly binding to and inactivating iNOS and COX-2 enzymes after their synthesis.
  2. By increasing the synthesis of annexin A1, which directly inhibits iNOS and COX-2 transcription.
  3. By preventing the activation of transcription factors, such as NF-κB, that are required for iNOS and COX-2 gene expression. (correct answer)
  4. By accelerating the metabolic degradation of nitric oxide and prostaglandins in the circulation.
Explanation: Glucocorticoids exert their anti-inflammatory effects primarily through genomic mechanisms. The glucocorticoid-receptor complex can repress the expression of pro-inflammatory genes. A key mechanism is interfering with the activity of pro-inflammatory transcription factors like Nuclear Factor-kappa B (NF-κB) and Activator Protein-1 (AP-1). Since these transcription factors are essential for inducing the expression of genes like iNOS and COX-2 during an inflammatory response, their inhibition by glucocorticoids prevents the synthesis of these enzymes.

Question 7

A 58-year-old male with rheumatoid arthritis has been managed with long-term, high-dose prednisone. He presents with gradually worsening dull pain in his upper back and a noticeable loss of height. An X-ray reveals a vertebral compression fracture. This adverse effect is primarily a consequence of glucocorticoid-mediated:

  1. increased intestinal calcium absorption and suppression of parathyroid hormone.
  2. inhibition of osteoblast function and promotion of osteoclast survival. (correct answer)
  3. enhanced conversion of vitamin D to its active form, calcitriol.
  4. stimulation of osteoprotegerin (OPG) production by osteoblasts.
Explanation: Glucocorticoid-induced osteoporosis is a major adverse effect. The primary mechanism involves direct effects on bone cells: glucocorticoids inhibit the function and differentiation of osteoblasts (bone-forming cells) and promote the apoptosis of osteoblasts and osteocytes. They also enhance the survival and activity of osteoclasts (bone-resorbing cells) by increasing the expression of RANKL and decreasing the expression of its decoy receptor, osteoprotegerin (OPG). This combination shifts bone remodeling in favor of resorption, leading to bone loss and increased fracture risk.

Question 8

A 48-year-old kidney transplant recipient is on a maintenance regimen including tacrolimus and prednisone. He presents with new-onset severe right hip pain, which is exacerbated by weight-bearing. An MRI of the hip is ordered. This patient's presentation is highly suspicious for which glucocorticoid-associated adverse effect?

  1. Osteoporotic fracture of the femoral neck.
  2. Avascular necrosis of the femoral head. (correct answer)
  3. Septic arthritis of the hip joint.
  4. Steroid-induced proximal myopathy.
Explanation: Avascular necrosis (AVN), or osteonecrosis, is a serious complication of high-dose or long-term glucocorticoid therapy. The femoral head is the most commonly affected site. The mechanism is not fully understood but is thought to involve impaired blood supply to the bone, possibly due to microvascular occlusion by fat emboli, intravascular coagulation, or increased intraosseous pressure. The presentation of severe, localized joint pain, particularly in a weight-bearing joint like the hip, is characteristic of AVN.

Question 9

The anti-inflammatory properties of glucocorticoids include the suppression of arachidonic acid metabolites. The primary mechanism for reducing the synthesis of both prostaglandins and leukotrienes is:

  1. direct competitive inhibition of both cyclooxygenase and lipoxygenase enzymes.
  2. upregulation of the synthesis of annexin A1, which in turn inhibits phospholipase A2. (correct answer)
  3. downregulation of the expression of prostaglandin H synthase at the transcriptional level.
  4. increasing the expression of 15-hydroxyprostaglandin dehydrogenase, which catabolizes prostaglandins.
Explanation: Glucocorticoids inhibit the entire arachidonic acid cascade at its origin. They do this indirectly by inducing the synthesis of a protein called annexin A1 (also known as lipocortin-1). Annexin A1 inhibits the activity of phospholipase A2 (PLA2), the enzyme responsible for liberating arachidonic acid from membrane phospholipids. By reducing the availability of the precursor, arachidonic acid, glucocorticoids decrease the production of all its downstream metabolites, including prostaglandins (via the COX pathway) and leukotrienes (via the lipoxygenase pathway).

Question 10

A patient with a history of latent tuberculosis infection (positive PPD, negative chest X-ray) is being considered for a long-term course of high-dose glucocorticoids for a severe autoimmune disease. The physician's primary concern regarding the latent infection is that glucocorticoids may cause reactivation by primarily impairing the function of:

  1. neutrophils responsible for phagocytosing mycobacteria.
  2. B-lymphocytes and antibody production against tuberculosis.
  3. macrophages and CD4+ T-helper cells that form and maintain granulomas. (correct answer)
  4. natural killer (NK) cells involved in the initial innate response.
Explanation: Control of latent tuberculosis infection relies on cell-mediated immunity, specifically the formation of granulomas that 'wall off' the mycobacteria. These granulomas are maintained by a complex interplay between activated macrophages and cytokine-producing T-lymphocytes, particularly CD4+ T-helper 1 (Th1) cells. Glucocorticoids are potent suppressors of cell-mediated immunity. They inhibit macrophage activation and function, and they suppress the production of key cytokines (like IFN-γ and TNF-α) by T-cells, which can lead to the breakdown of granulomas and reactivation of the latent infection.

Question 11

A 65-year-old woman with polymyalgia rheumatica on long-term, low-dose prednisone complains of progressive, painless blurring of her vision and increased glare from headlights at night. An ophthalmologic examination is most likely to reveal which of the following findings?

  1. Increased intraocular pressure and optic nerve cupping.
  2. Neovascularization of the retina and macular edema.
  3. Posterior subcapsular cataracts. (correct answer)
  4. Inflammatory cells in the anterior chamber (uveitis).
Explanation: Long-term systemic glucocorticoid use is a significant risk factor for the development of posterior subcapsular cataracts. This type of cataract is characterized by opacities on the back surface of the lens, which can cause symptoms of glare (especially at night) and a gradual, painless decrease in visual acuity. While increased intraocular pressure (glaucoma) is another potential ocular side effect, the patient's specific symptoms are more classic for cataracts.

Question 12

A 45-year-old woman with systemic lupus erythematosus has been on 40 mg of prednisone daily for 8 weeks. Her physician decides to slowly taper the dose over the next two months. The primary physiological reason for this gradual dose reduction is to:

  1. prevent a rebound inflammatory flare of her underlying autoimmune disease.
  2. allow the adrenal cortex to recover its ability to produce endogenous cortisol. (correct answer)
  3. minimize the risk of developing Cushingoid features during the withdrawal period.
  4. avoid acute psychological dependence and withdrawal symptoms like agitation.
Explanation: Prolonged administration of exogenous glucocorticoids suppresses the hypothalamic-pituitary-adrenal (HPA) axis. The hypothalamus reduces CRH release, and the pituitary reduces ACTH release, leading to atrophy of the adrenal cortex. If the exogenous steroid is withdrawn abruptly, the atrophied adrenal gland cannot produce sufficient cortisol to meet the body's needs, leading to a life-threatening adrenal crisis. Tapering the dose slowly allows the HPA axis to recover and endogenous cortisol production to resume.

Question 13

A patient with a skin wound is treated with a potent topical glucocorticoid. The surgeon notes that the wound healing process is significantly delayed. This impairment is most directly related to the glucocorticoid's inhibitory effects on:

  1. platelet aggregation and initial clot formation.
  2. re-epithelialization and angiogenesis.
  3. neutrophil demargination and chemotaxis.
  4. fibroblast proliferation and collagen synthesis. (correct answer)
Explanation: While glucocorticoids affect all phases of wound healing, their most significant impact on the structural integrity and tensile strength of the healed wound is the inhibition of the proliferative phase. They directly inhibit the proliferation of fibroblasts and their synthesis of collagen and other extracellular matrix components. This leads to a weaker scar and delayed wound closure. While they also inhibit inflammation (C) and angiogenesis (part of B), the effect on fibroblasts and collagen is central to the poor healing quality.

Question 14

A 58-year-old male with rheumatoid arthritis has been managed with long-term, high-dose prednisone. He presents with gradually worsening dull pain in his upper back and a noticeable loss of height. An X-ray reveals a vertebral compression fracture. This adverse effect is primarily a consequence of glucocorticoid-mediated:

  1. increased intestinal calcium absorption and suppression of parathyroid hormone.
  2. inhibition of osteoblast function and promotion of osteoclast survival. (correct answer)
  3. enhanced conversion of vitamin D to its active form, calcitriol.
  4. stimulation of osteoprotegerin (OPG) production by osteoblasts.
Explanation: Glucocorticoid-induced osteoporosis is a major adverse effect. The primary mechanism involves direct effects on bone cells: glucocorticoids inhibit the function and differentiation of osteoblasts (bone-forming cells) and promote the apoptosis of osteoblasts and osteocytes. They also enhance the survival and activity of osteoclasts (bone-resorbing cells) by increasing the expression of RANKL and decreasing the expression of its decoy receptor, osteoprotegerin (OPG). This combination shifts bone remodeling in favor of resorption, leading to bone loss and increased fracture risk.

Question 15

A 45-year-old woman with systemic lupus erythematosus has been on 40 mg of prednisone daily for 8 weeks. Her physician decides to slowly taper the dose over the next two months. The primary physiological reason for this gradual dose reduction is to:

  1. prevent a rebound inflammatory flare of her underlying autoimmune disease.
  2. allow the adrenal cortex to recover its ability to produce endogenous cortisol. (correct answer)
  3. minimize the risk of developing Cushingoid features during the withdrawal period.
  4. avoid acute psychological dependence and withdrawal symptoms like agitation.
Explanation: Prolonged administration of exogenous glucocorticoids suppresses the hypothalamic-pituitary-adrenal (HPA) axis. The hypothalamus reduces CRH release, and the pituitary reduces ACTH release, leading to atrophy of the adrenal cortex. If the exogenous steroid is withdrawn abruptly, the atrophied adrenal gland cannot produce sufficient cortisol to meet the body's needs, leading to a life-threatening adrenal crisis. Tapering the dose slowly allows the HPA axis to recover and endogenous cortisol production to resume.

Question 16

A patient on chronic glucocorticoid therapy develops hyperglycemia. This effect is a result of several metabolic actions of glucocorticoids. Which of the following mechanisms is the most significant contributor to steroid-induced hyperglycemia?

  1. Decreased glucagon secretion from pancreatic alpha cells.
  2. Increased glucose uptake by peripheral tissues, such as skeletal muscle.
  3. Stimulation of hepatic gluconeogenesis and decreased insulin sensitivity. (correct answer)
  4. Inhibition of glycogenolysis in the liver and muscle.
Explanation: Glucocorticoids raise blood glucose levels through multiple mechanisms. The most significant are increasing hepatic glucose output via stimulation of gluconeogenesis (synthesis of glucose from non-carbohydrate precursors like amino acids) and inducing insulin resistance in peripheral tissues (skeletal muscle, adipose tissue), which decreases glucose uptake. They do not decrease glucagon secretion (they may increase it) and they do not inhibit glycogenolysis.

Question 17

The anti-inflammatory properties of glucocorticoids include the suppression of arachidonic acid metabolites. The primary mechanism for reducing the synthesis of both prostaglandins and leukotrienes is:

  1. direct competitive inhibition of both cyclooxygenase and lipoxygenase enzymes.
  2. upregulation of the synthesis of annexin A1, which in turn inhibits phospholipase A2. (correct answer)
  3. downregulation of the expression of prostaglandin H synthase at the transcriptional level.
  4. increasing the expression of 15-hydroxyprostaglandin dehydrogenase, which catabolizes prostaglandins.
Explanation: Glucocorticoids inhibit the entire arachidonic acid cascade at its origin. They do this indirectly by inducing the synthesis of a protein called annexin A1 (also known as lipocortin-1). Annexin A1 inhibits the activity of phospholipase A2 (PLA2), the enzyme responsible for liberating arachidonic acid from membrane phospholipids. By reducing the availability of the precursor, arachidonic acid, glucocorticoids decrease the production of all its downstream metabolites, including prostaglandins (via the COX pathway) and leukotrienes (via the lipoxygenase pathway).

Question 18

A 65-year-old woman with polymyalgia rheumatica on long-term, low-dose prednisone complains of progressive, painless blurring of her vision and increased glare from headlights at night. An ophthalmologic examination is most likely to reveal which of the following findings?

  1. Increased intraocular pressure and optic nerve cupping.
  2. Neovascularization of the retina and macular edema.
  3. Posterior subcapsular cataracts. (correct answer)
  4. Inflammatory cells in the anterior chamber (uveitis).
Explanation: Long-term systemic glucocorticoid use is a significant risk factor for the development of posterior subcapsular cataracts. This type of cataract is characterized by opacities on the back surface of the lens, which can cause symptoms of glare (especially at night) and a gradual, painless decrease in visual acuity. While increased intraocular pressure (glaucoma) is another potential ocular side effect, the patient's specific symptoms are more classic for cataracts.

Question 19

A patient is prescribed a short course of high-dose dexamethasone to manage cerebral edema associated with a brain tumor. Which of the following adverse effects is most likely to manifest within the first few days of therapy?

  1. Osteoporosis with vertebral fractures.
  2. Insomnia, euphoria, or mood lability. (correct answer)
  3. Posterior subcapsular cataracts.
  4. Suppression of the HPA axis leading to adrenal crisis.
Explanation: Neuropsychiatric effects of glucocorticoids can occur acutely, often within days of starting high-dose therapy. These can range from mild effects like insomnia and anxiety to more severe reactions such as euphoria, depression, mania, or psychosis ('steroid psychosis'). The other listed effects—osteoporosis, cataracts, and clinically significant HPA axis suppression requiring a taper—are all complications of chronic, long-term glucocorticoid use.

Question 20

A patient on chronic prednisone therapy for an autoimmune disorder develops hypertension. While glucocorticoids can increase vascular sensitivity to catecholamines, what is the principal mechanism by which they directly contribute to elevated blood pressure?

  1. Direct activation of alpha-1 adrenergic receptors in vascular smooth muscle.
  2. Binding to and activation of mineralocorticoid receptors in the renal distal tubules. (correct answer)
  3. Inhibition of the renin-angiotensin-aldosterone system via negative feedback.
  4. Stimulation of atrial natriuretic peptide (ANP) release from the heart.
Explanation: At supraphysiologic doses, glucocorticoids like prednisone can cross-react and bind to mineralocorticoid receptors (MR) in the kidney. The natural ligand for the MR is aldosterone. Activation of the MR promotes sodium and water reabsorption in the distal convoluted tubule and collecting duct, leading to volume expansion and hypertension. This effect is independent of the renin-angiotensin-aldosterone system, which is actually suppressed by the volume expansion.