The association between acetaminophen and asthma: is there anything to learn from the upper airways?

Area of Science:

• Pediatric Allergy and Immunology
• Environmental Health
• Epidemiology

Background:

• Acetaminophen (paracetamol) is a widely used antipyretic during pregnancy and infancy.
• Its increased use has prompted hypotheses regarding potential links to allergic diseases.
• Existing literature on acetaminophen and rhinitis is limited and methodologically challenged.

Purpose of the Study:

• To review existing literature on the association between acetaminophen (paracetamol) use and the development of rhinitis.
• To identify gaps in current research and propose future study designs.

Main Methods:

• Literature review of studies examining acetaminophen (paracetamol) exposure and rhinitis development.
• Analysis of methodological limitations in published research, including confounding factors.

Main Results:

• A significant paucity of well-designed birth cohort studies exists for paracetamol and rhinitis.
• Confounding factors such as antibiotic use, viral infections, and recall bias complicate interpretation of current evidence.
• The role of acetaminophen as a risk factor for rhinitis remains largely unconfirmed.

Conclusions:

• Prospective birth cohort studies are essential to adequately assess paracetamol exposure.
• Paracetamol exposure should be a primary variable of interest, not incidentally collected.
• Future research requires dedicated resources and time to establish causality.