Journal List > Allergy Asthma Immunol Res > v.6(1) > 1052470

Yoo, Yang, Kim, Hwang, Shin, Ye, Nahm, and Park: A Case of Codeine Induced Anaphylaxis via Oral Route

Abstract

Codeine is widely prescribed in clinical settings for the relief of pain and non-productive coughs. Common adverse drug reactions to codeine include constipation, euphoria, nausea, and drowsiness. However, there have been few reports of serious adverse reactions after codeine ingestion in adults. Here, we present a case of severe anaphylaxis after oral ingestion of a therapeutic dose of codeine. A 30-year-old Korean woman complained of the sudden onset of dyspnea, urticaria, chest tightness, and dizziness 10 minutes after taking a 10-mg dose of codeine to treat a chronic cough following a viral infection. She had previously experienced episodes of asthma exacerbation following upper respiratory infections, and had non-atopic rhinitis and a food allergy to seafood. A skin prick test showed a positive response to 1-10 mg/mL of codeine extract, with a mean wheal size of 3.5 mm, while negative results were obtained in 3 healthy adult controls. A basophil histamine release test showed a notable dose-dependent increase in histamine following serial incubations with codeine phosphate, while there were minimal changes in the healthy controls. Following a CYP2D6 genotype analysis, the patient was found to have the CYP2D6*1/*10 allele, indicating she was an intermediate metabolizer. An open label oral challenge test was positive. To the best of our knowledge, this is the first report of a patient presenting with severe anaphylaxis after the ingestion of a therapeutic dose of codeine, which may be mediated by the direct release of histamine by basophils following exposure to codeine.

INTRODUCTION

Codeine is a methylated morphine derivative that is found naturally in poppy seeds.1 Codeine has analgesic and antitussive activities, and has been widely prescribed in clinical settings. Common adverse drug reactions include constipation, euphoria, nausea, and drowsiness. Immediate allergic reactions such as pruritus and urticarial skin rashes can develop, but severe anaphylactic reactions are very rare.2-4

CASE REPORT

A 30-year-old woman experienced dyspnea, urticaria, chest discomfort, and sweating within 10 minutes after taking codeine orally to treat a chronic cough. She had suffered from bronchial asthma since 2010, and her asthma was frequently exacerbated following multiple attacks of upper respiratory infection. Since her severe cough did not improve after the viral infection, codeine phosphate at a dose of 10 mg a day was prescribed to suppress her symptoms for 1 week. She did not experience any adverse drug reactions during the first week of codeine treatment; however, after 1 week, approximately 10 minutes after taking the codeine, she began to develop dyspnea, urticaria, sweating, and chest discomfort. In response to these symptoms, she stopped taking the medication. The patient had perennial rhinitis and a food allergy to shellfish, which presented as hives; however, she had no previous history of any drug allergies. She was referred to our clinic for the evaluation of her codeine allergy and the uncontrolled asthma. On the first visit, eosinophilia was not detected in peripheral blood, sputum, or nasal smears. Serum total and specific IgE levels to shrimp and crab were within the normal ranges. A skin prick test (SPT) to all of the common inhalant allergens (Bencard, Bradford, UK) showed negative responses. A forced expiratory volume at 1 second (FEV1), as measured by spirometry, was 62.5% predictive.
After stabilizing her asthma, we planned to perform in vivo and in vitro tests to confirm whether her systemic reactions were caused by codeine and to evaluate the mechanism of the codeine-induced anaphylaxis. A SPT, a basophil histamine release test, and an open-label oral challenge test (OPT) were performed with codeine phosphate after obtaining informed consent. Furthermore, CYP2D6 genetic polymorphisms, which are often responsible for differences in responses to codeine between individuals, were evaluated. The SPT was performed with codeine (0.1-10 mg/mL) and morphine (0.1-10 mg/mL) extracts. Histamine and saline were tested as positive and negative controls, respectively. The SPT was positive to 1-10 mg/mL codeine with a mean wheal size of 3.5 mm, while negative results were obtained in 3 healthy adult controls. (No response to saline, 6×4 mm to histamine, 2×2 mm to morphine 0.1 mg/mL, 5×4 mm to morphine 1-10 mg/mL.) The OPT revealed a positive response. There was no response to initial intake of 5 mg codeine phosphate. When 10 mg codeine phosphate was administered after 2 hours, she immediately developed a systemic reaction, including dyspnea, wheeze, chest tightness, dizziness, and vomiting. Her blood pressure was 140/80 mmHg, pulse rate 95/minute, and body temperature was 36.8℃. The basophil histamine release test, which was performed according to previously described methods,5 showed a dose-dependent increase with serial additions of codeine phosphate, while minimal changes were noted in the 2 controls (Figure).The CYP2D6 genotyping results revealed that the patient had the CYP2D6*1/*10 allele, which indicated that she was an intermediate metabolizer according to the expected enzyme activities reported on the CYP2D6 allele web site (http://www.imm.ki.se/CYPalleles/cyp2d6.htm). Based on these findings, the expert definition of her final diagnosis was codeine-induced anaphylaxis.6 We recommended her to avoid taking any codeine-based products. Her asthma and rhinitis were controlled using a medium dose of inhaled corticosteroids with a long-acting beta2-agonist inhaler, a leukotriene receptor antagonist, and an intranasal steroid. After 1 year, her FEV1% had improved to 87.3% predictive (2.23 L) compared to her initial FEV1 level (62.5% predictive, 1.58 L).

DISCUSSION

To the best of our knowledge, this is the first report of a patient who presented with codeine-induced anaphylaxis after taking an oral therapeutic dose. Codeine is commonly prescribed for the symptomatic relief of non-productive coughs, alongside other antitussives or expectorants. It suppresses the cough reflex by acting directly on the central medulla of the brain. In this study, the patient took codeine due to severe cough symptoms of asthma. Immediately after codeine ingestion, she developed anaphylaxis. Previous studies have suggested that cutaneous allergic reactions to codeine can be induced by the non-immunological induction of histamine release.3,7,8 There have been even rarer hypersensitivity reactions to codeine, including generalized maculopapular eruptions, bullous eruptions, fixed drug eruptions, drug-induced hypersensitivity syndrome, or even toxic epidermal necrolysis.2,9-13 In this study, we confirmed anaphylaxis by OPT. To clarify the pathogenic mechanism, we performed SPT and found positive reactions to codeine extracts.14 We performed an in vitro basophil histamine releasing test, which showed a significant increase in codeine-induced effects, compared to the results in 2 controls. At least 1 patient demonstrated the presence of serum-specific IgE antibodies to morphine and codeine and a life-threatening anaphylactic reaction developed after intravenous administration of a mixture of morphine and codeine hydrochloride.15 Previous research has shown that opiate codeine can cause direct mast cell degranulation without the presence of a specific IgE antibody. As a result, it has been used as a positive control in SPTs.16-18 To exclude the possibility that our patient was an ultra-rapid metabolizer carrying two alleles of active CYP2D6,19 we performed a CYP2D6 genotype analysis and found that she was an intermediate metabolizer carrying the CYP2D6*1/*10 allele.20 This indicates a low possibility that her anaphylaxis is derived from the rapid metabolism of codeine followed by a morphine overproduction. As we could not confirm the presence of serum-specific IgE to codeine, we cannot completely exclude any possibility of IgE-mediated anaphylaxis. However, based on the above results, we suggest that the anaphylaxis in the present study could be caused by a codeine-induced direct histamine releasing effect on basophils.
We conclude that oral administration of codeine can induce anaphylaxis via a non-immunologic mechanism, such as a direct basophil histamine releasing effect in susceptible subjects. Further studies will be needed to investigate predisposing factors to screen susceptible subjects.

Figures and Tables

Figure
Comparison of histamine concentrations released from basophils after serial additions of codeine phosphate in the patient and the 2 healthy normal controls (NC1 and NC2).
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ACKNOWLEDGEMENTS

This study is supported by the National Research Foundation (NRF), a grant from the Korean government (MEST 213-003341).

Notes

There are no financial or other issues that might lead to conflict of interest.

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TOOLS
ORCID iDs

Yoo-Seob Shin
https://orcid.org/http://orcid.org/0000-0002-9855-3185

Young-Min Ye
https://orcid.org/http://orcid.org/0000-0002-7517-1715

Hae-Sim Park
https://orcid.org/http://orcid.org/0000-0003-2614-0303

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