Abstract
We present a case of probable anaphylactic shock induced by intravenous hydrocortisone in a 72-year-old male patient with septic shock. The patient, admitted for management of infected pressure injuries, was initiated on hydrocortisone (200 mg/day) for vasopressor-resistant shock. Within 30 min of the first dose administration, he manifested clinical signs consistent with anaphylaxis, including refractory hypotension, tachycardia, and prolonged capillary refill time. Immediate hydrocortisone discontinuation, aggressive fluid resuscitation, norepinephrine uptitration, intravenous methylene blue administration, and amiodarone initiation for ventricular rate control resulted in hemodynamic stabilization and vital sign normalization. This event was categorized as severe (Hartwig scale level 5) and assessed as probably preventable (Modified Schoumock and Thornton scale). A Naranjo score of four supported a probable adverse drug reaction (ADR). A concurrent disulfiram-like reaction (DLR) secondary to cefoperazone-sulbactam was excluded based on clinical timeline and presentation. This case underscores that glucocorticoids, despite their anti-allergic properties, can precipitate anaphylaxis in critically ill patients, emphasizing the necessity for heightened clinical vigilance and strict adherence to administration guidelines within this vulnerable population.
Plain language summary
This summary details the alarming case of a 72-year-old man suffering from hypertension, type 2 diabetes, and post-stroke limb dysfunction, who endured a potentially fatal anaphylactic reaction—a violent allergic response—after receiving intravenous hydrocortisone (a glucocorticoid) for septic shock triggered by a severe infection. This critical infection originated from worsening stage II pressure injuries (bedsores) on his hips and sacrum, culminating in life-threatening hemodynamic instability demanding ICU admission and aggressive blood pressure support. Remarkably, within mere minutes of hydrocortisone administration (intended to manage his shock), the patient suffered an abrupt, catastrophic decline: unresponsive hypotension, a dangerously rapid heart rate, and severely compromised peripheral circulation (evidenced by sluggish capillary refill). Clinicians urgently investigated the cause, successfully ruling out a reaction to the concurrently administered antibiotic (cefoperazone-sulbactam) and employing a standard drug adverse reaction scale (the Naranjo score) to definitively link the crisis to hydrocortisone. This incident serves as a stark reminder that glucocorticoids—frequently perceived as safe—can provoke severe allergic reactions through both immune and non-immune mechanisms, particularly in patients experiencing septic shock. Their imbalanced immune state significantly heightens the risk of drug hypersensitivity. Consequently, it underscores the imperative for extreme caution and intensive monitoring when administering these commonly used agents to critically ill, infected patients. This report powerfully underscores that even standard therapeutic interventions can yield unexpected and potentially catastrophic effects in vulnerable individuals, compelling clinicians to maintain unwavering vigilance and strengthen safety protocols during medication delivery.
Introduction
Glucocorticoids, established therapeutic agents in the clinical management of septic shock, possess irreplaceable value in critical care medicine due to their multifaceted pharmacological properties, including anti-inflammatory, anti-allergic, and anti-shock effects. Paradoxically, while exerting anti-allergic therapeutic actions, these agents may also function as rare sensitizers capable of inducing anaphylactic shock. The earliest documented instance of glucocorticoid allergy was identified within a 1985 review, 1 which chronicled over thirty cases of systemic glucocorticoid hypersensitivity reported by that period. Subsequent clinical reports have described glucocorticoid-induced immediate hypersensitivity reactions occurring worldwide,2,3 and in 2005, the American Contact Dermatitis Society designated glucocorticoids its annual allergen of the year. 4 However, in the context of polypharmacy, particularly when accounting for individualized pathophysiological characteristics of patients, the clinical identification of glucocorticoid-induced allergic reactions becomes markedly more complex. To address these challenges and ensure methodological rigor, we used the CARE checklist 5 during the preparation of this case report (Supplemental Material). Accordingly, this clinical case report details a representative instance of sudden hemodynamic decompensation in a patient with septic shock following intravenous hydrocortisone administration. We prepared this report to establish diagnostic criteria for informing clinical decision-making in differentiating glucocorticoid-induced sensitization reactions from DLRs associated with concomitant medications. Furthermore, this case elucidates strategies for mitigating similar glucocorticoid-related ADRs.
Case report
The patient was a geriatric male presenting with “bilateral hip and sacrococcygeal ulcerative lesions persisting for 6 weeks.” One month preceding admission, he manifested an acute respiratory syndrome characterized by productive cough, wheezing, and febrile episodes (peak temperature 38.7°C), accompanied by hypotensive crisis (80/40 mmHg) in a long-term care facility, with no identifiable predisposing factors. Following unsuccessful management with intravenous fluid resuscitation, broad-spectrum antimicrobial therapy, and bronchodilator treatment, the patient underwent emergency transfer to our institution. Comprehensive diagnostic evaluation confirmed severe community-acquired pneumonia, prompting hospital admission. During hospitalization, the patient received multimodal therapeutic interventions including targeted antibiotic therapy, corticosteroid administration, mucolytic agents, electrolyte repletion, and enteral nutritional support, culminating in clinical stabilization and subsequent discharge. Notably, the patient developed progressive stage II pressure injuries in the sacrococcygeal region and bilateral trochanteric areas during prolonged immobilization. Current admission was necessitated by specialized wound management of these pressure injuries.
The patient’s medical history included essential hypertension with a 25-year duration, characterized by a peak recorded blood pressure of 180/100 mmHg. Current management with oral Sacubitril/Valsartan 100 mg once daily maintained adequate hemodynamic stability. Concurrent type 2 diabetes mellitus (10-year duration) demonstrated suboptimal glycemic control despite daily administration of oral Dapagliflozin 10 mg once daily. Neurological sequelae from a 2018 acute left middle cerebral artery infarction resulted in persistent right hemiparesis and Broca’s aphasia, rendering the patient fully bedbound with complete dependence for activities of daily living. Past surgical history was notable for appendectomy (1978). There was no documented history of drug hypersensitivity reactions or anaphylaxis. Immunization records were not formally documented. Relevant personal history revealed a four-decade tobacco use history (cessation achieved 7 years prior) and no alcohol consumption. Following hospital admission, the patient underwent standardized wound management and enteral nutritional supplementation. At 20:00 h on April 12, 2025, the patient manifested acute respiratory distress characterized by wheezing and oxygen desaturation to 85%. Clinical assessment revealed hemodynamic instability with vital signs as follows: blood pressure 88/41 mmHg, heart rate 105 bpm, and respiratory rate 27 cycles/min. Physical examination demonstrated labored open-mouth breathing accompanied by bilateral pulmonary rales and rhonchi. Given progressive cardiorespiratory instability, the patient was transferred to intensive care for advanced monitoring.
The critically ill patient received endotracheal intubation with concomitant mechanical ventilation to maintain airway patency and ensure adequate oxygenation. This intervention was supplemented with continuous sedation and analgesia administered via sufentanil and midazolam infusions. Hemodynamic stabilization was achieved through targeted vasopressor therapy, administering norepinephrine, vasopressin, and methylene blue, alongside antimicrobial treatment consisting of tigecycline (Chiatai Tianqing Pharmaceutical Group, batch 240814115, 50 mg/dose) and cefoperazone-sulbactam sodium (Pfizer, batch 8190645, 1.5 g/dose). Owing to persistent refractory hemodynamic instability unresponsive to initial interventions, hydrocortisone (China National Pharmaceutical Group Rongsheng Co., Ltd., batch 2409201, 20 ml:100 mg) 200 mg in 100 mL of 0.9% sodium chloride solution, was administered for septic shock management on April 15, in accordance with the 2021 international guidelines for the management of sepsis and septic shock. 6 Notably, within 30 min post-hydrocortisone administration (initiated at 11:30), the patient exhibited progressive cardiovascular collapse, manifested by: (1) tachycardia progression (92→128 bpm); (2) hypotensive crisis (50–61/24–45 mmHg); (3) respiratory compensation (19→31 rpm); (4) peripheral circulatory failure (cold extremities with diaphoresis); and (5) normothermic maintenance (36.5°C–36.8°C). Following the onset of hemodynamic instability during hydrocortisone infusion administration, a potential ADR was clinically suspected. The hydrocortisone intravenous infusion was promptly discontinued, with concomitant upward titration of norepinephrine and methylene blue dosages to maintain hemodynamic stability. Concurrent administration of amiodarone was initiated for ventricular rate control, supplemented by supportive measures including volume resuscitation. This therapeutic regimen aimed to address both cardiovascular instability and underlying metabolic disturbances through pharmacologic intervention and essential supportive care. After symptomatic treatment, subsequent hemodynamic monitoring revealed stabilization in the patient’s vital signs: blood pressure ranging from 106–135/44–68 mmHg, heart rate maintained between 70 and 96 bpm, and respiratory rate within 18–22 breaths per minute. Regrettably, the blue discoloration of the patient’s skin induced by methylene blue injection compromised the observation of clinical signs during ADR episodes. This impediment precluded accurate assessment of facial color changes and potentially delayed the timely identification of the aforementioned ADR. Nevertheless, close monitoring of the ADR was maintained by the clinical team, and effective countermeasures were implemented, thereby ensuring the patient’s safety.
Discussion
Glucocorticoids compensate for the absolute or relative insufficiency of adrenal cortisol during stress through exogenous supplementation, activating the genomic effects of cytoplasmic glucocorticoid receptors. This mechanism specifically inhibits the nuclear translocation of pro-inflammatory transcription factors, such as NF-κB, significantly reducing the synthesis and release of pro-inflammatory cytokines, including interleukin-6 and tumor necrosis factor-α. Concurrently, by upregulating α-adrenergic receptor expression, glucocorticoids enhance the physiological responsiveness of vascular endothelial cells to circulating catecholamines. These dual mechanisms synergistically stabilize hemodynamic status, manifested as an increase in mean arterial pressure and a reduction in vasopressor dependence, thereby effectively reversing the pathological progression of shock.7,8 Given their well-documented pharmacological effects, glucocorticoids have become an integral component of comprehensive septic shock management protocols. The 2021 guidelines for the diagnosis and treatment of septic shock explicitly recommend adjunctive intravenous glucocorticoid therapy for anti-shock treatment when high-dose vasopressors are required to maintain blood pressure. Hydrocortisone is the preferred agent, with a recommended dosage of 200 mg/day, administered as a 50 mg intravenous bolus every 6 h or via continuous infusion. The optimal timing for initiation is within at least 4 h after norepinephrine or epinephrine reaches ⩾0.25 μg/(kg·min). 6 In this instance, the maximum norepinephrine dosage administered reached 0.5 μg/(kg·min), yet mean arterial pressure remained below 65 mmHg, thereby meeting the criteria for glucocorticoid therapy. However, the initiation of hydrocortisone was notably delayed, commencing only on the third day of conventional anti-shock treatment. Whether the delayed administration negatively impacted the therapeutic efficacy of hydrocortisone remains unclear.
The patient exhibited the classical shock triad (hypotension, tachycardia, and peripheral circulatory failure) during hydrocortisone infusion, coinciding with multiple concurrent therapeutic interventions, including sufentanil, midazolam, enteral nutrition via nasogastric tube (TPF-D emulsion), and polypharmacy comprising cefoperazone-sulbactam, tigecycline, aminophylline, atorvastatin, mosapride, and rivaroxaban. While a temporal correlation exists between hydrocortisone administration and the onset of ADRs, the patient presented with hypotension upon ICU admission and received a clinical diagnosis of septic shock. Notably, the shock state persisted despite adequate fluid resuscitation and anti-infective therapy. Consequently, no definitive causal relationship could be established between the ADR occurrence and specific drug administration, nor could it be determined whether the event constituted a manifestation of the disease’s natural progression. The complexity of assessing ADR causality was further heightened by the patient’s extensive polypharmacy. The Naranjo causality assessment 9 yielded a score of four, indicating a “possible” association (Table 1). In addition, the ADR observed in this patient precipitated a decline in blood pressure to hypotensive shock levels, compromising respiratory and cardiovascular function (Table 2). This event necessitated intravenous pharmacological intervention and emergency resuscitation. In accordance with Hartwig’s Severity Assessment Scale, 10 this ADR was categorized as severe (level 5). For preventability analysis, we also consider definite, probable, and possible ADRs. The Modified Schumock and Thornton criteria 11 for preventability analysis are detailed in Table 3, and this ADR was assessed as “probably preventable.”
Questions comprising the Naranjo algorithm employed in causality evaluation of ADRs. 9
The ADR was assigned to a probability category from the total score as follows: definite ⩾9, probable 5 to 8, possible 1 to 4, doubtful ⩽0.
ADR, adverse drug reaction.
Hartwig’s scale depicting assessment criteria and corresponding severity levels for ADRs severity assessment. 10 .
ADR, adverse drug reaction.
Modified Schoumock and Thornton scale listing questions utilized in the assessment of preventability categories for ADRs. 11 .
ADR, adverse drug reaction.
Current literature demonstrates that ADRs to glucocorticoids predominantly manifest as immediate hypersensitivity responses and immune-mediated reactions, characterized by mucocutaneous manifestations (rash, urticaria, pruritus), respiratory complications (dyspnea, laryngeal edema, bronchospasm), and hemodynamic disturbances (anaphylactic shock). Pharmacoepidemiologic studies reveal that hydrocortisone and methylprednisolone exhibit the most significant associations with these reactions. Patient cohorts with asthma and organ transplant recipients demonstrate elevated ADR risks, while intravenous administration exhibits a substantially higher ADR incidence compared to oral or intramuscular routes.2,3,12–15 The potential mechanisms underlying the ADR in this case may involve the following aspects:
Pharmacochemical characteristics: Hydrocortisone (systematic IUPAC name: 11β,17α,21-trihydroxypregn-4-ene-3,20-dione) primarily elicits allergic responses through its oxidative metabolite, 21-dehydrocorticosteroid, rather than the parent compound. The reactive glyoxal moiety in this metabolite forms covalent adducts with arginine residues, generating complete antigens that initiate immune activation. This process triggers IgE/IgM-mediated type I hypersensitivity reactions, complement system activation, and the subsequent release of inflammatory mediators (including histamine) from mast cells and basophils, culminating in nonspecific allergic manifestations.16–18
Pharmaceutical excipients: The inherent hydrophobicity of glucocorticoids necessitates solubilizing agents such as ethanol, phosphate buffers, acetate, or succinate esters, all of which possess inherent allergenic potential.2,19 While the patient reported tobacco use without ethanol consumption, this history renders ethanol-induced hypersensitivity unsubstantiated. This clinical scenario emphasizes the necessity of thorough excipient allergy screening (particularly ethanol sensitivity) when administering glucocorticoid formulations containing such adjuvants.
Dilution protocol deviations: Pharmacopoeial specifications (China National Pharmaceutical Group Rongsheng, 2021 Edition) mandate that hydrocortisone injections containing 50% ethanol require complete dilution prior to administration. Consequently, the product instructions explicitly stipulate that hydrocortisone injection (specification: 20 mL:100 mg) must be fully diluted for intravenous use. Specifically, it should be mixed immediately prior to administration with either 25 times its volume of sodium chloride injection or 500 mL of 5% glucose injection to achieve a final concentration of 0.2 mg/mL. The documented administration of 200 mg of hydrocortisone in 100 mL of 0.9% sodium chloride solution, yielding a concentration of 2 mg/mL, significantly exceeds the stipulated concentration threshold, thereby directly contravening both pharmacopoeial and manufacturer guidelines. This deviation represents a primary causative factor for the observed pseudoallergic reaction.
Drug-drug interactions: In this case, the patient received combined therapy with cefoperazone-sulbactam sodium and hydrocortisone injection using ethanol as a solvent. The acetaldehyde produced during metabolism of the latter synergized with the methylthiotetrazole group in the molecular structure of cefoperazone-sulbactam sodium, competitively inhibiting aldehyde dehydrogenase activity. This resulted in blocked acetaldehyde metabolism, ultimately inducing DLRs. 20 This risk warning has been clearly stated in the drug package insert: characteristic reactions, including flushing, sweating, headache, and tachycardia, may occur if the patient consumes alcohol during cefoperazone treatment or within 5 days after discontinuation.
Patient’s pathophysiological status: Literature indicate that the incidence of allergic reactions to systemically administered hydrocortisone is approximately 0.3%–0.5%.21,22 However, in septic shock, the immunoparalysis state caused by an imbalance between pro-inflammatory and anti-inflammatory factor networks can significantly enhance the non-selective inhibitory effects of glucocorticoids on immune cells, further amplifying their broad-spectrum immunosuppressive effects on both innate and adaptive immunity. This disruption of immune homeostasis may markedly lower the immune tolerance threshold for drug excipients or metabolic intermediates, potentially triggering IgE-mediated immediate hypersensitivity or T-cell-dependent delayed allergic reactions.23,24
In summary, the occurrence of the aforementioned ADR in this patient may be related to the structural characteristics of hydrocortisone injection itself, the use of excipients, the combined use of cefoperazone sodium and sulbactam sodium, failure to dilute according to the concentration specified in the drug instructions, and the patient’s pathophysiological state, all of which collectively contributed to the occurrence of this ADR. Notably, in addition to hydrocortisone injection, allergic reactions to other glucocorticoids have been documented in the literature and case reports.15,21,25–27 The underlying mechanisms demonstrate both shared characteristics and individual variations, suggesting possible incomplete cross-allergenicity among different glucocorticoids. 28
However, there exists no documented evidence addressing the primary diagnostic challenge of differentiating hypersensitivity reactions induced by hydrocortisone injection from DLRs, particularly in circumstances where hydrocortisone injections are co-administered with pharmacological agents known to induce DLRs—a critical distinction for informing appropriate clinical management.
In the differential diagnosis between hydrocortisone injection-induced hypersensitivity reactions and DLRs, particular attention must be paid to the following distinguishing characteristics: clinically, while both conditions demonstrate overlapping manifestations, including cutaneous erythema, respiratory distress, hypotension, and tachycardia, critical differentiation lies in dermatological presentation. The key distinguishing points between the two are: patients with DLRs typically do not present with typical rashes or urticaria, and gastrointestinal symptoms (such as nausea and vomiting) are more prominent; whereas in allergic reactions, over 90% of cases manifest cutaneous symptoms such as angioedema, urticaria, and pruritus. 29 This clinical divergence originates from distinct pathophysiological mechanisms: immunoglobulin E (IgE)-mediated type I hypersensitivity underlies drug reactions, whereas disulfiram-like phenomena arise from acetaldehyde accumulation secondary to aldehyde dehydrogenase inhibition, representing a non-immunogenic metabolic disorder. This mechanistic distinction provides theoretical justification for employing in vitro diagnostic modalities, including cutaneous provocation testing and patch testing. 28 Temporally, corticosteroid-related immediate hypersensitivity reactions predominantly manifest within minutes following parenteral administration or inhalation exposure, with topical applications potentially inducing contact urticaria within 20 min. Delayed hypersensitivity reactions to topical corticosteroids typically emerge after hours to days, presenting as eczematous dermatitis requiring confirmatory patch testing. Contrastingly, DLRs demonstrate characteristic temporal patterns, with most cases developing symptoms within 5–60 min post-ethanol exposure, though rare delayed presentations may occur up to 24 h following ingestion. Etiologically, hydrocortisone hypersensitivity represents aberrant immunoreactivity to active pharmaceutical ingredients or excipients, whereas DLRs diagnosis necessitates the satisfaction of two essential criteria: (1) recent pharmacological exposure (⩽7 days) to agents with aldehyde dehydrogenase inhibitory properties; (2) confirmed ethanol contact preceding symptom onset, encompassing dietary ethanol consumption, pharmaceutical ethanol-containing preparations, or cutaneous ethanol-based antiseptic applications. This case meets the core diagnostic criteria for a DLR (recent history of cefoperazone sodium and sulbactam sodium use and ethanol exposure), but also exhibits the typical temporal characteristics of a glucocorticoid allergic reaction, complicating the differential diagnosis between the DLR and the ADR induced by hydrocortisone injection. To clarify the distinction, glucocorticoid skin prick testing or patch testing can be performed to rule out an allergic reaction, while dynamically monitoring the patient’s ethanol exposure history and medication records; if the clinical presentation is predominantly characterized by disulfiram-like features such as flushing, palpitations, and vomiting, and lacks positive immunological test evidence, the diagnosis of a DLR is supported. However, in this case, allergy testing was not performed due to the low incidence of allergic reactions (approximately 0.3%–0.5%21,22) and the patient’s subsequent death, which precluded follow-up and thereby failed to satisfy laboratory confirmation criteria for an allergic reaction to hydrocortisone injection. Following the discontinuation of hydrocortisone injection and the continuation of cefoperazone-sulbactam therapy, the patient attained hemodynamic stability within 6 h after targeted medical intervention. Furthermore, the patient had previously been treated with cefoperazone-sulbactam as an anti-infective agent before the current hospitalization and reported no history of allergies. Based on the temporal sequence of drug exposure, clinical manifestations, and therapeutic response, this case strongly supports the diagnosis of anaphylactic shock induced by hydrocortisone injection. While as a single-case report with inherent sample size limitations, the external validity of these findings requires further multicenter validation.
Conclusion
This case illustrates that glucocorticoids, although employed in the management of allergic reactions, may themselves induce anaphylactic shock. To enhance the prediction and prevention of such adverse events, we recommend the integration of systematic risk assessment protocols into clinical practice, particularly for high-risk patients—such as patients with immunologically active conditions (e.g., sepsis) or those receiving complex medication regimens. Where appropriate, pre-administration skin testing or in vitro allergenicity screening should be considered to identify susceptible individuals. Strict adherence to established preparation protocols—including appropriate dilution and administration techniques—coupled with enhanced pharmacovigilance measures, can further mitigate the incidence of these reactions.
Supplemental Material
sj-docx-1-taw-10.1177_20420986261443460 – Supplemental material for Probable case of anaphylaxis due to hydrocortisone in a septic shock patient
Supplemental material, sj-docx-1-taw-10.1177_20420986261443460 for Probable case of anaphylaxis due to hydrocortisone in a septic shock patient by Yanqin Song, Nina Yang, Dingjin Zhou and Dingge Cai in Therapeutic Advances in Drug Safety
Footnotes
Acknowledgements
We extend our acknowledgment to chief physician Wansuo Xu of the intensive care unit and director Jianfeng Li of the medical department, both affiliated with the Second Affiliated Hospital of Yunnan University of Traditional Chinese Medicine, for their consistent support of this research. This study could not have been conducted without their collective professional insights.
Declarations
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References
Supplementary Material
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