Please use this link to access this publication. Abstract Background Cannabis use in patients with allergy/asthma, a high-risk group for adverse effects to cannabis, is unknown. Objective To determine the patterns of use and attitudes toward cannabis in patients with allergy/asthma. Methods An anonymous online survey on cannabis attitudes and use was conducted through the Adult Allergy & Asthma Network. The Asthma Control Test assessed asthma burden. Cluster analyses determined group phenotypes and factor analyses condensed cannabis subjective effects into similar response patterns. Results A total of 88 of 489 respondents (18.0%) currently use cannabis with most at the age of less than 50 years old, of female sex, and of...