These three common pain conditions affect millions of Americans every day.

"I don't know of a pain condition that doesn't affect sleep," says Roth.

Studies have found that it can help with many different pain conditions, like osteoarthritis and cancer pain.

It is used to treat some chronic pain and acute pain conditions.

For years, people with this chronic pain condition were told their symptoms were not real but times have changed.

It also may help ease some chronic pain conditions, including:

Back pain is the most commonly reported pain condition in America.

Let's say a patient with fatigue from a pain condition needed to work fewer hours.

It has been developed as an analgesic and is currently under development for the treatment of various pain conditions.

Together, they make up the most widely used group of drugs for treating pain conditions.