Sensitization to omeprazole in the occupational setting.

Area of Science:

• Occupational Health
• Dermatology
• Pharmacology

Background:

• Omeprazole, a proton pump inhibitor, is widely used for acid-related gastrointestinal disorders.
• Recent reports indicate potential dermatitis linked to occupational omeprazole exposure during manufacturing.

Purpose of the Study:

• To investigate and present diagnostic findings for workers reporting hypersensitivity reactions to omeprazole.
• To assess the occupational risk of omeprazole-induced skin allergy.

Main Methods:

• Ninety-six workers with suspected omeprazole allergy underwent clinical evaluation and immunological testing.
• Lymphocyte transformation test (LTT) and skin patch tests were performed within six months of symptom onset.
• Predictive delayed contact hypersensitivity tests were conducted on guinea pigs.

Main Results:

• Thirty-one symptomatic workers showed positive LTT results.
• Patch testing revealed positive results in 28 workers, with 23 also having a positive LTT (LTT sensitivity: 82%).
• Guinea pig models demonstrated delayed contact hypersensitivity to omeprazole.

Conclusions:

• Occupational exposure to omeprazole poses a significant risk of sensitization and skin allergy.
• Findings are crucial for developing safer omeprazole formulations and enantiomers.
• This study underscores the need for vigilance regarding omeprazole-induced hypersensitivity in manufacturing settings.