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Sensitization to weeping fig was diagnosed in 23 of the 346 consecutive
patients, and the simultaneous presence of latex-specific IgE was highly
significant. In this study, of 151 natural rubber latex-allergic patients,
35 were also sensitized to weeping fig. Cross-reacting IgE antibodies
recognizing latex and Ficus allergens were demonstrated by RAST inhibition.
(Brehler 1998 ref.7510 3)

Many cases of perennial allergic rhinoconjunctivitis and allergic asthma
caused by Ficus benjamina hypersensitivity are not detected. These patients
typically have proven sensitization to housedust mites and do not improve
after avoidance of exposure (encasing) and specific immunotherapy. Fb itself
is a potential sensitizer which is widely spread as ornamental plant in
homes and offices. As relevant indoor allergen Fb ranks third after
housedust mites and pets but before molds among our allergy patients.
(Schenkelberger 1998 ref.2304 1)
In a list of asian herbs used to alleviate asthma is different types of
"ficus" plants.
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