ANDERSON, Ind. - An Indiana woman featured on MTV's reality show "Teen Mom" has been sentenced to five years in prison after opting out of a drug-treatment program.

Amber Portwood pleaded guilty in February to felony possession of a controlled substance and admitted violating her probation. The 22-year-old avoided prison by entering a drug rehabilitation program.

But on Tuesday, after she quit the program, a Madison County judge sentenced her to the five-year term she originally faced.

Prosecutor Rodney Cummings tells The Indianapolis Star that Portwood said she just couldn't do it and "wanted out of the program."

Her attorney didn't return messages seeking comment.

Portwood received probation in 2010, after pleading guilty to domestic battery charges stemming from an incident with her now 3-year-old daughter's father that appeared on the MTV show.