You were still treated during your initial interview, and if you ever injured yourself then you would have been tested again. I will repeat myself, but make it more clear this time so you understand.
The only jobs that consistently do not drug test are fast food, retail, hospitality, and the cannabis industry. These jobs rarely test during interview process, and rarely test because of injury. If you figure out a way to find companies that don’t drug test please let me know, I’m desperate.