Yaba addiction: The dark side of Bangladesh's increasing affluence

A sign points the way into a rehab in Cox's Bazar in Bangladesh. Since the yaba methamphetamine crisis began, 80% of clients here are using the drug problematically.

Dhaka, Bangladesh (CNN)"I'm telling your dad," said Angela and marched out with a fistful of foil and methamphetamine pills.

Rafi watched his bedroom door swing shut and wondered why he wasn't trying to stop her.
Rafi was only 24, but his skin was gray and each ragged eye was Martian red. His head jerked an involuntary tick; he coughed and wondered what to do next.
    Angela had been rifling through his drawer looking for a cigarette when she found Rafi's stash of pills that he had been smoking from foil -- known among users as "chasing the dragon."
      "I didn't try and stop her because I realized getting caught was good," said Rafi, while relaying the story.
      "I really wanted to stop because I was feeling horrible ... My parents must have known something was wrong, but I think they were in denial," he added.
      In 2006, Rafi was one of the rich kids who started using the colorful pills, known as yaba, when they first began circulating in Dhaka, the Bangladeshi capital.
      Today, yaba is everywhere.
      An off-duty boarder guard blocks his face from being photographed. The Naf River, which divides Bangladesh and Myanmar, is perforated by illegal vessels carrying drugs and Rohingya refugees. Officials here distrust journalists.
      Yaba is a combination of methamphetamine and caffeine. They are candy like tablets that come in different flavors, and bright colors. Users typically heat the tablet, which sits on aluminum foil, and then inhale the vapors from the melting tablets. Others crush the tablets into powder and snort them.