Most of the time, it's from prescription drugs like oxycodone or hydrocodone.

Thes drugs all belonged to a family of drugs called opioids.

They're prescribed to dull pain, but they also boost dopamine, giving some people ah, high.

They can also slow down your breathing and are highly addictive.

So why is it so easy to get hooked?

Well, for one, your body can build up a tolerance, so the more you use the larger dose you need to get the same effect.

Secondly, you could become dependent on them.

In fact, your body creates natural opioids that are released when you hurt yourself.

But if you habitually use painkillers, your body stops producing its own and relies on the drugs instead.

If you try and stop, then the body goes through withdrawal.

Consider this.

In 2012 there were 259 million prescriptions written for opioid painkillers, nearly enough for every American adult and child to have their own bottle of pills.