The drug market is a massive market.
Its estimated to be worth more than $4 trillion.
Drugmakers have made a lot of money selling these pills to people across the world.
And because the pills are legal, they have a huge profit margin.
But they have also attracted the attention of law enforcement.
Krokodes, or ketamine, is a popular drug used to treat addiction.
Kroks and its related ketamine derivatives are available on the black market.
They can be bought online and at convenience stores.
They have been known to sell to people in remote areas of the world and even for people who have been trafficked for sex.
They’re also used for recreational use in some countries, such as Brazil.
This post originally appeared on The Conversation.