The government yesterday released details of its £170m plan to train 3,600 more psychological therapists in the wake of a study showing that antidepressant drugs such as Prozac are no more effective than a placebo.About 900,000 more people will be treated for depression and anxiety under the plan, according to the Department of Health, which predicts that 450,000 of them will be completely cured. The department also believes that 25,000 fewer people will claim sick pay and benefits because of mental health problems.