So where I live if you have a disease, physical or mental, you go to a doctor and they decide if you're ok to drive or if you need to pass an extra test first where you are judged if you're able to drive safely with whatever disabilities you have. This is besides the standard driving test and written test. Also everybody has to take lessons with a professional.
It's however not perfect because the government doesn't have access to your medical records (which is good). But that means you have to be honest on a form about your disabilities. Plus the doctor visit is not covered by insurance and costs around 200 euros.
Plus if you already have your licence there isn't really a system in place to prevent you for driving if your health declines.
It's stress hormones you use to handle stress with becoming an emotional wreck. This includes physical stress like getting sick but also of course emotional stress.
The effects of low cortisol are similar to a burnout and high cortisol makes you worry and restless on the low end and paranoid at the high end.
Corticosteroids are synthetic versions of this and often use to treat infections and inflammation.