As the headline is phrased, the answer is almost certainly "yes". Even if you have an objective diagnosis and a rigorously developed treatment, you'd expect fa

As the headline is phrased, the answer is almost certainly "yes". Even if you have an objective diagnosis and a rigorously developed treatment, you'd expect far less than 100% success; and you'd also expect side effects and other harm that happens with almost any treatment. Given that mental health is much less rigorous than some other areas of medicine (because it's hard to make it rigorous), then its compounded by misdiagnosis and treatments where we don't understand the effects.