LONDON - Addiction to social media is recognized as an official condition in the United Kingdom.

A study by the University of Chicago in 2012 found social media can be even more addictive than cigarettes and alcohol.

The research found using features like "retweets" and "likes" gives the user a burst of the addictive neurotransmitter dopamine.

Consultant psychiatrist doctor Richard Graham says he treats around 100 social-media addicts a year at a London clinic.

"They start to miss or avoid doing the necessary things in life, even at a fundamental level of self-care. They delay eating or avoid eating or drinking, delay sleep, miss meetings or delay getting into work or college," Dr. Graham said.

His patients range from children to 35-year-old adults.