He wouldn't have to "specifically request" a reversible MAOI. At this point, irreversible MAOIs (besides the use of Selegiline and Rasagiline in the treatment of Parkinsonism) are virtually unheard of in Europe. Only the most experienced psychiatrists are still willing to prescribe them to treat depression, which is a fucking shame.
And let me point something out: The biggest danger for people with severe mental illnesses isn't drug interactions, it's blowing their brains out because life has become unbearable for them. Or worse yet, being forced to live a life of constant suffering because the disease even saps them of the will to kill themselves.