According to CBS News, as marijuana becomes more widely consumed, we now have to start worrying about people being allergic to the plant. A study published in Annals of Allergy, Asthma and Immunology has found that, just like with other plant allergens, cannabis pollen can cause eye inflammation, asthma and allergic rhinitis. Additionally, edible products made from the substance pose risks as well. One study subject required antihistamines and epinephrine after experiencing an allergic reaction to hemp seed-encrusted seafood, and tests proved that the reaction was to the hemp seed and not the seafood. Doctors say avoidance is the best solution to marijuana allergies, but symptoms can be alleviated with nasal decongestants, intranasal steroids or antihistamines.