 In 2015, 14 companies donated $116 million to patient advocacy groups.A database identifying more than 1,200 patient groups showed that six pharmaceutical companies contributed $1 million or more in 2015 to individual groups representing patients who use their drugs, and 594 groups in the database received donations from pharmaceutical companies.Fifteen patient groups relied on pharmaceutical companies for at least 20 percent of their revenue in the same year, and some received more than half of their revenue from pharmaceutical companies.