For men with chronic psychiatric illness, when and how do you incorporate evaluation for hypogonadism?

Symptoms of hypogonadism (fatigue, low energy, low libido, decreased muscle mass) can overlap with those of psychiatric conditions. Antipsychotic medications can induce secondary hypogonadism and antidepressants can cause sexual side effects that could confound an assessment for hypogonadism. Do you order morning total testosterone, prolactin, or other labs? Do you reserve this for men with clear symptoms or do you screen more broadly for higher risk groups, like those on antipsychotics?