Antidepressant drugs don't work – official study

They are among the biggest-selling drugs of all time, the "happiness pills" that supposedly lift the moods of those who suffer depression and are taken by millions of people in the UK every year.

But one of the largest studies of modern antidepressant drugs has found that they have no clinically significant effect. In other words, they don't work.

The treatments that do work

* Exercise: Helps some people with depression. Douglas Adams, author of The Hitchhiker's Guide to the Galaxy, said running helped him cope with depression.

* Friends: Talking through your feelings can help in mild depression with a friend or relative or in a self-help group.

* Cognitive behavioural therapy: Teaches you to challenge negative thoughts and feelings of hopelessness.

* Interpersonal therapy: Focuses on relationships and problems such as difficulties with communication.

* Counselling: Helps you think about the problems in your life and find new ways of dealing with them.

* Antidepressants: Increasingly seen as a second-line treatment, if exercise or talking treatments do not work.