Nelly Rodriguez found the answer to her chronic back pain just when she least expected it, in the middle of a coronavirus quarantine that had made her condition worse. The 70-year-old pensioner's salvation came in the form of Bogota's first medical cannabis clinic, which opened in March and says it has since treated nearly 1,000 patients. Clinic Zerenia only sells oils containing cannabidiol (CBD) or tetrahydrocannabinol (THC), or a mix of the two.