Clinical validation of controlled grass pollen challenge in the Environmental Exposure Unit (EEU)

Table 1 Medication washout periods

Medication class	Washout period
Antihistamines	7 days
Intranasal or inhaled corticosteroids	14 days
Intranasal or inhaled cromolyn	14 days
Systemic corticosteroids or astemizole	30 days

Participants were required to adhere to these washout periods prior to screening or pollen exposure visits.

ISSN: 1710-1492