There is actually a restraint on me from reporting things that are held confidential due to the medical relationship, the doctor-patient relationship. However, there are specific areas where I am relieved of my duty of confidentiality, for example, in mandatory reporting of drivers where I have reason to believe someone has a condition that would make it dangerous for them to drive. For that there is specific legislation that relieves me of my confidentiality restrictions.
That doesn't necessarily apply in the situations that I'm describing here, where patients may have increased risk of suicidality or dementia and impulsive behaviour. That is a restriction.