Fibromyalgia is a real disease. Or so says Pfizer in a new television advertising campaign for Lyrica, the first medicine approved to treat the pain condition, whose very existence is questioned by some doctors.

For patient advocacy groups and doctors who specialize in fibromyalgia, the Lyrica approval is a milestone. They say they hope Lyrica and two other drugs that may be approved this year will legitimize fibromyalgia, just as Prozac brought depression into the mainstream.

But other doctors  including the one who wrote the 1990 paper that defined fibromyalgia but who has since changed his mind  say that the disease does not exist and that Lyrica and the other drugs will be taken by millions of people who do not need them.

As diagnosed, fibromyalgia primarily affects middle-aged women and is characterized by chronic, widespread pain of unknown origin. Many of its sufferers are afflicted by other similarly nebulous conditions, like irritable bowel syndrome.