depression
Life insurance companies typically view depression as a condition that needs intercession or the patient becomes overwhelmed by negative feelings. Of particular interest is whether the person has been admitted to a hospital due to being overwhelmed, whether their were thoughts or acts of self harm including suicide. Whether their ability to lead a full and productive life has been impaired.
In these types of situations, underwriters will postpone issuing a policy until the person has achieved some control over what they are experiencing. Also consistent care and followup is desireable. Don't make the mistake of assuming that an underwritere wants to see someone off their medication, quite the opposite. Pharmacology has come a long way and underwriters give substantial weight to how well your doctor feels your situation has progressed.