Baseline characteristics of study participants are shown in Table 4. Most of the participants were female (71.57%), white (76.47%), and the mean age was 35.9 ± 12.04 years old. Medical history of the participants revealed that the most common reported conditions were related to respiratory/thoracic disorders (11.80%) followed by musculoskeletal and connective tissue disorders (7.80%), gastrointestinal disorders (6.90%), and immune system disorders (5.90%). A total of 134 concomitant medications usages were reported by 63 participants (Table 4 and Figure 2). Of these concomitant medications, 15 were reported for cold-related symptoms as defined by questions 2–11 on the WURSS-21 (Table 1); 29 were reported for non-cold related indications that may have affected common cold symptoms; and 90 concomitant medications were reported for indications unrelated to the common cold (Supplemental Table 3).