LOS ANGELES — Propelled by an increase in prescription narcotic overdoses, drug deaths now outnumber traffic fatalities in the United States, a Los Angeles Times analysis of government data has found.

Drugs exceeded motor vehicle accidents as a cause of death in 2009, killing at least 37,485 people nationwide, according to preliminary data from the U.S. Centers for Disease Control and Prevention.

While most major causes of preventable death are declining, drugs are an exception. The death toll has doubled in the last decade, now claiming a life every 14 minutes. By contrast, traffic accidents have been dropping for decades because of huge investments in auto safety.

Public health experts have used the comparison to draw attention to the nation’s growing prescription drug problem, which they characterize as an epidemic. This is the first time that drugs have accounted for more fatalities than traffic accidents since the government started tracking drug-induced deaths in 1979.

Prescription drugs

Fueling the surge in deaths are prescription pain and anxiety drugs that are potent, highly addictive and especially dangerous when combined with one another or with other drugs or alcohol. Among the most commonly abused are OxyContin, Vicodin, Xanax and Soma. One relative newcomer to the scene is Fentanyl, a painkiller that comes in the form of patches and lollipops and is 100 times more powerful than morphine.

Such drugs now cause more deaths than heroin and cocaine combined.

“The problem is right here under our noses in our medicine cabinets,” said Laz Salinas, a sheriff’s commander in Santa Barbara, which has seen a dramatic rise in prescription drug deaths in recent years.

Overdose victims range in age and circumstance from teenagers who pop pills to get a heroin-like high to middle-aged working men and women who take medications prescribed for strained backs and bum knees and become addicted.

A review of hundreds of autopsy reports in Southern California reveals one tragic demise after another: A 19-year-old Army recruit who had just passed his military physical took a handful of Xanax and painkillers while partying with friends. A groom, anxious over his upcoming wedding, overdosed on a cocktail of prescription drugs. A teenage honors student overdosed on painkillers her father left in his medicine cabinet from a surgery years earlier. A toddler was orphaned after both parents overdosed on prescription drugs months apart. A grandmother suffering from chronic back pain apparently forgot she’d already taken her daily regimen of pills and ended up double dosing.

Many died after failed attempts at rehab — or after using one too many times while contemplating quitting.

A new epidemic

The seeds of the problem were planted more than a decade ago by well-meaning efforts by doctors to mitigate suffering, as well as aggressive sales campaigns by pharmaceutical manufacturers. In hindsight, the liberalized prescription of pain drugs “may in fact be the cause of the epidemic we’re now facing,” said Linda Rosenstock, dean of the University of California, Los Angeles School of Public Health.

In some ways, prescription drugs are more dangerous than illicit ones because users don’t have their guard up, said Los Angeles County Sheriff’s Sgt. Steve Opferman, head of a county task force on prescription drug-related crimes. “People feel they are safer with prescription drugs because you get them from a pharmacy and they are prescribed by a doctor,” Opferman said. “Younger people believe they are safer because they see their parents taking them. It doesn’t have the same stigma as using street narcotics.”