People with severe mental health problems should be given a set of new rights to ensure that they receive better care when they are detained for compulsory treatment, as a study by Theresa May has found.

The 50,000 or so people who come under the Mental Health Act each year should be able to explain how they want to be cared for and question the doctors' decisions, said independent independent study for one year under the direction of Prof. Sir Simon Wessely Ex-President of the Royal College of Psychiatrists.

The review states that patients detained in a psychiatric ward need to significantly extend their rights, as the detention may be "traumatic" and "harmful".

While patients may feel comfortable, they should be able to formulate the form in which they wish to take their treatment, such as the medicines they wish to receive, in new advanced selection documents that would be required by law. Any doctor who decides to bypass the patient's needs must explain why he did so.

Patients should be able to dispute the decisions taken by a psychiatrist regarding their treatment at a tribunal in the same way as the decisions already taken with regard to their detention, the team said.

"If there is an important issue to the whole thing, it is to make sure that the patient's voice is heard louder and more clearly and carries more weight than in the past," said Wessely.

"Even when deprived of their liberty, patients still have a say in treatment, with greater and newer protections than before."

Patients should also be able to seek a second opinion about their treatment more quickly and choose a nominated person as the "nearest relative" who will act as their lawyer and not be assigned one as before.

The NHS also needs to dramatically increase psychiatric out-of-hospital benefits to keep patients healthy and make compulsory treatment a last resort, the study said.

Mental health groups supported this call, but emphasized that psychiatric services must overcome serious financial and staffing problems before this ambition can be realized.

Over the past year, the review has examined why more and more people are detained, such as the "careless" way in which some included patients are cared for, and the "unacceptable overrepresentation" of people from ethnic minority groups, especially those from African and African ethnic groups Caribbean conditions, including those listed under the Act.

The Ministry of Health and Social Affairs responded to the report by agreeing to submit some, but not all, of the recommendations in a new mental health law. It sets out the recommendations of the investigation in the pre-decision documents and the next of kin.

"I commissioned this review because I am determined to ensure that people suffering from mental health problems are treated with dignity and respect, respecting their freedom and autonomy," the Prime Minister said.

"By advancing this historic legislation – the new law on mental health – we can ensure that people control their care and get the right treatment and support they need."