10. K2
This is a synthetic marijuana that has the same effects as regular marijuana, but it has many side effects. However, people may abuse the drug and end up in emergency room. This drug is human made, and it can be smoked as shredded and dried plant material or it may be sold as a liquid so that it may be vaporized and inhaled. It may also be sold to be used with an e-cigarette or with other devices. The products are known as liquid or herbal incense. However, the substance is not regulated and it can alter the mind.