One synonym that can be used for "took the cure" is "rehabilitated." This implies that the person sought help or treatment for a particular issue, such as addiction or a medical condition, and successfully completed a program or treatment plan. Another option is "recovered," which suggests that the individual has overcome a challenge or obstacle, such as an illness, through medical treatment or natural healing. "Cleaned up" is a more informal synonym that can be used in the context of addiction recovery, indicating that the person has stopped using drugs or alcohol. Overall, these synonyms convey the idea that someone has made a positive change and taken steps to improve their health and well-being.