History or presence of any respiratory disease or condition other than allergic rhinitis

Use of prescription medication or herbal remedies within 14 days of dosing the study drug

Use of over-the-counter (OTC) medications within 7 days of dosing the study drug

Acute infection (including viral infections) 6 weeks (8 weeks for respiratory infections) preceding dosing or any ongoing chronic infection

Positive test for human immunodeficiency virus (HIV) or hepatitis B or C

A Study of RO4989991 in Patients With Allergic Rhinitis