Allergic disorders have been described in a variety of connective tiss
ue disorders. Although an association between allergy and primary Sjog
ren's syndrome has been suggested, it has not been well documented. Th
e purpose of this study was to analyze the prevalence of several types
of allergic disorders in a cohort of primary Sjogren's syndrome patie
nts. The presence of an allergic disorder was evaluated by a specific
questionnaire in 65 randomly selected primary Sjogren's syndrome patie
nts and was compared to control groups of 67 rheumatoid arthritis pati
ents, 53 patients with rheumatoid arthritis and sicca symptoms, and 31
patients with osteoarthritis. At least one type of allergic manifesta
tion was reported by 42 of the 65 Sjogren's syndrome patients (65%). T
his rate was significantly higher than each of the three control group
s (p<0.01). Only drug allergy and skin contact allergy were found to b
e more prevalent in Sjogren's syndrome patients than in the control gr
oups (p<0.05). Allergic reactions were more common in Sjogren's syndro
me patients who were anti-Re positive (p<0.05). As drug and skin conta
ct allergies are a frequent finding in Sjogren's syndrome patients, ob
taining a careful history is needed before prescribing drugs in these
patients.