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. 2022 Aug 17;158(10):1208–1210. doi: 10.1001/jamadermatol.2022.2421

Proton Pump Inhibitors Associated With Drug-Induced Lupus Erythematosus

Pauline Bataille 1,, Bénédicte Lebrun-Vignes 2, Florence Tubach 3, Marine Aroux-Pavard 4, Christelle Philibert 5, François Chasset 1, Annick Barbaud 1
PMCID: PMC9386607  PMID: 35976639

Abstract

This descriptive case series investigates the potential association between the use of proton pump inhibitors and drug-induced lupus erythematosus in cases reported in 2 large pharmacovigilance databases.


The role of proton pump inhibitors (PPIs) in the occurrence of drug-induced lupus erythematosus (DILE) has been suggested for both drug-induced systemic lupus erythematosus (DI-SLE) and drug-induced cutaneous lupus erythematosus (DI-CLE) but remains poorly characterized.1,2,3 Therefore, the aims of this study were, first, to investigate the pharmacovigilance signal of PPI-associated DILE using different indicator tools for disproportionate reporting and, second, to better characterize the spectrum of PPI-associated DILE by focusing on the type of DILE as well as therapeutic management.

Methods

In this case series, we performed a disproportionality study using data from VigiBase, the World Health Organization’s global pharmacovigilance database. This study was approved by all French Regional Pharmacovigilance Centers. Because this study used exclusively secondary and publicly available data, no ethical approval was required. For all PPIs and each molecule, a case–noncase study was performed to assess a potential pharmacovigilance signal in computing the information components (ICs) and reporting odds ratios (RORs). We also performed sensitivity analyses, taking into account only cases reported after January 1, 2002, and only those cases reported by physicians. In addition, we described clinical, immunological, and therapeutic management of the suspected PPI-associated DILE from the French pharmacovigilance database (eMethods in the Supplement). The level of significance assessed was P < .05. Statistical analyses were performed in RStudio, version 1.2.5001 (RStudio). Data were analyzed from December 2019 to September 2021.

Results

Among 21 104 559 cases reported in VigiBase from January 1985 to December 2019, 625 were DILE associated with a PPI. The median (IQR) age at onset of DILE was 59.0 (48.0-68.0) years, and 489 cases (78.2%) involved female patients. In 307 cases (49.1%), a PPI was the only suspected drug. Omeprazole was the most frequently involved PPI (n = 190; 30.4%). Statistical pharmacovigilance signals were observed for esomeprazole (IC025, 0.67; ROR, 1.84; 95% CI, 1.60-2.13), lansoprazole (IC025, 0.72; ROR, 1.97; 95% CI, 1.65-2.36), and omeprazole (IC025, 0.70; ROR, 1.87; 95% CI, 1.63-2.13), concordant in sensitivity analyses (Table 1, see footnote "a" for complete definition of IC025).

Table 1. Reporting Odds Ratios (RORs) With Their 95% CIs and IC025a for Drug-Induced Lupus Erythematosus With All Proton Pump Inhibitors (PPIs) and With Each Molecule Using VigiBaseb.

Metric All PPIs Esomeprazole Lansoprazole Omeprazole Pantoprazole Rabeprazole
IC025 0.65c 0.67c 0.72c 0.70c −0.33 −2.86
ROR (95% CI) 1.72 (1.59-1.87)c 1.84 (1.60-2.13)c 1.97 (1.65-2.36)c 1.87 (1.63-2.13)c 1.17 (0.94-1.45) 0.95 (0.59-1.53)
Localization of reports, France
IC025 1.65c 1.78c 1.20c 0.94c 0.64c 2.61c
ROR (95% CI) 3.88 (2.98-5.05c 4.52 (3.01-6.80)c 4.22 (2.10-8.47)c 2.62 (1.54-4.45)c 3.37 (1.80-6.29)c 12.31 (6.11-24.80)c
Date, cases reported after January 1, 2002
IC025 0.76c 0.75c 0.84c 0.87c −0.19 −2.07
ROR (95% CI) 1.86 (1.71-2.02)c 1.94 (1.68-2.24)c 2.12 (1.76-2.55)c 2.89 (2.56-3.26)c 1.26 (1.00-1.58)c 1.06 (0.67-1.70)
Reporter qualification, physician
IC025 1.19c 1.67c 1.51c 0.75c 1.00c −0.34
ROR (95% CI) 2.57 (2.22-2.97)c 3.75 (2.87-4.91)c 3.55 (2.56-4.93)c 2.13 (1.66-2.73)c 2.61 (1.90-3.59)c 2.04 (1.06-3.93)c

Abbreviation: IC, information component.

a

IC025 is the lower end of a 95% credibility interval for the IC. An IC025 of greater than 0 emits a pharmacovigilance signal.

b

The noncases were patients exposed to the drug of interest with other drug reactions besides drug-induced lupus erythematosus and patients exposed to other drugs with other drug reactions. In sensitivity analyses, cases were compared with noncases in France reported after January 1, 2002, and reported only by physicians.

c

Values indicate a statistical signal detection through VigiBase disproportionality analyses.

Among 791 922 cases reported in the French pharmacovigilance database between January 1985 and December 2019, 60 were DILE associated with a PPI. After reviewing 60 records, 49 patients were included (Table 2). The median (IQR) age was 68.0 (58.8-78.0) years, and 32 of 49 (65.3%) were female patients. Esomeprazole was the most frequently involved PPI (n = 23; 46.9%). An isolated DI-CLE was observed in 39 patients (79.6%), including subacute DI-CLE (n = 19; 48.7%), discoid DI-CLE (n = 2; 5.1%), tumidus DI-CLE (n = 1; 2.6%), and unspecified DI-CLE (n = 17; 43.6%). Seven patients (14.3%) had DI-SLE with cutaneous involvement, and most specified cases were of the subacute type (n = 3; 42.9%). The PPI was stopped in 35 of 41 patients (71.5%), in whom remission occurred in 18 of 35 patients (51.4%) without specific treatment.

Table 2. Demographic, Clinical, Immunological, and Histological Characteristics of the Study Population Using the French Pharmacovigilance Database.

Characteristic Patients, No. (%) (n = 49)
Age, median (IQR), y (n = 48) 68.0 (58.8-78.0)
Sex
Female 32 (65.3)
Male 17 (34.7)
History of autoimmune diseases 8 (16.3)
PPI
Esomeprazole 23 (46.9)
Lansoprazole 5 (10.2)
Omeprazole 8 (16.3)
Pantoprazole 9 (18.4)
Rabeprazole 4 (8.2)
Onset time, median (IQR), wk (n = 33) 12.0 (4.0-52.0)
Drug imputability
PPI only suspected drug 16 (32.6)
Several suspected drugs, of which PPI is the most suspected drug 19 (38.8)
Several suspected drugs, of which PPI has equivalent imputability 14 (28.6)
Cutaneous lupus erythematosus 39 (79.6)
Subacute 19 (48.7)
Discoid 2 (5.1)
Tumidus 1 (2.6)
NA 17 (43.6)
Systemic lupus erythematosus with cutaneous involvement 7 (14.3)
Subacute 3 (42.9)
Discoid 0
Tumidus 0
NA 4 (57.1)
Systemic lupus erythematosus without cutaneous involvement 3 (6.1)
Type of antibodies
Antinuclear antibody (n = 39) 36 (92.3)
Anti-dsDNA (n = 36) 8 (22.2)
Anti-Sm (n = 35) 2 (5.7)
Anti-Ro/SSA (n = 38) 28 (73.7)
Anti-La/SSB (n = 35) 7 (20.0)
Histological confirmation
Yes 32 (65.3)
No 9 (18.4)
NA 8 (16.3)
Seriousness criteriaa 41 (83.7)
Deaths 0
PPI withdrawn or continued
PPI withdrawn 35 (71.5)
Recovery without specific treatment 18 (51.4)
Recovery with specific treatment 8 (22.9)
NA 9 (25.7)
PPI continuation 6 (12.2)
Recovery without specific treatment 0
Recovery with specific treatment 3 (50.0)
NA 3 (50.0)
NA 8 (16.3)
Prescribed treatment
Topical corticosteroids (n = 21) 19 (90.5)
Hydroxychloroquine (n = 31) 25 (80.6)
Oral corticosteroids (n = 34) 11 (32.3)
Immunosuppressives (n = 30) 2 (6.7)b
Prescribed treatment by lupus subtype
Cutaneous lupus erythematosus 39 (79.6)
Topical corticosteroids (n = 21) 18 (46.1)
Hydroxychloroquine (n = 31) 20 (51.3)
Oral corticosteroids (n = 34) 4 (10.3)
Immunosuppressives (n = 30) 2 (5.1)
Systemic lupus erythematosus with cutaneous involvement 7 (14.3)
Topical corticosteroids (n = 21) 0
Hydroxychloroquine (n = 31) 4 (57.1)
Oral corticosteroids (n = 34) 4 (57.1)
Immunosuppressives (n = 30) 0
Systemic lupus erythematosus without cutaneous involvement 3 (6.1)
Topical corticosteroids (n = 21) 0
Hydroxychloroquine (n = 31) 1 (33.3)
Oral corticosteroids (n = 34) 3 (100.0)
Immunosuppressives (n = 30) 0
Recovery time, median (IQR), moc (n = 15) 1.0 (0.75-1.5)

Abbreviations: NA, not available; PPI, proton pump inhibitor.

a

Seriousness criteria were defined as a life-threatening disease, a hospitalization, an occurrence of a disability, or other seriousness criteria according to the reporter qualification.

b

The immunosuppressive drug prescribed was thalidomide. Drug dosages were not specified.

c

Time initiates with the beginning of medical care.

Discussion

In this case series using 2 large pharmacovigilance databases, we highlighted that PPIs are associated with pharmacovigilance signals for the occurrence of DILE. An association between PPIs and the risk of DILE has been suggested in several studies using IC025.1,2,4,5 The present study confirmed this finding using not only IC025, but also ROR with data from 2 different databases and with sensitivity analyses performed. Moreover, we reported the therapeutic management of 49 PPI-associated DILE cases, which, to our knowledge, has never been done. Furthermore, accurate data on DILE subtypes associated with PPIs were scarce. This descriptive case series highlights that, first, PPIs may be associated with not only isolated DI-CLE, but also DI-SLE with or without cutaneous involvement. Second, among DI-CLE cases, subacute CLE is the most common subtype in contrast with discoid CLE in the general population. Finally, we also identified 2 cases of discoid CLE and 1 case of tumidus lupus, which emphasizes that other CLE subtypes may be associated with PPIs. Among the limitations of this study is the heterogeneity of the data available in the reports of adverse events. Moreover, the diagnosis of SLE and CLE may be confused with many other diseases. Therefore, we included only cases fulfilling validated classification criteria, and we performed sensitivity analyses to reduce the Weber effect, which is an epidemiologic phenomenon inducing an increased number of reported adverse reactions during the first 2 years of drug marketing, and to avoid selection bias induced by adverse events reported by nonphysicians.6

Supplement.

eMethods

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Associated Data

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Supplementary Materials

Supplement.

eMethods


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