He takes many different types of benzodiazepines and is well-read about all the different preparations that can be obtained, either online or from a pimp in town.
He has also sold drugs himself to finance his own addiction.
Today, "Erik", whose real name is something else, is 25 years old and believes that he could be free from addiction - if he received the right treatment.
He hopes the 12-step method and CBT therapy will help him become drug-free.
Increased the daily dose
"Erik" is currently homeless.
He has been sober for longer periods.
But after his last stay at a treatment center, he relapsed again.
He says he has several mental health diagnoses and he constantly needs to increase his daily dose of drugs.
Hear "Erik" tell about life as an addict.