The Medical Licensure Commission of Alabama has returned Herreras medical license to active status.
His medical license was suspended in 2001 after complaints about his prescriptions for patients with chronic pain.
Herrera, an Independent candidate for coroner in Cherokee County, was criticized for not keeping adequate records.
Herrera will remain on probation for an indefinite period of time and must complete courses in family practice or internal medicine courses.
His prescription-writing capabilities were reinstated to certain drugs, according to the Alabama Board of Medical Examiners.
Herrera has said he is eager to treat his patients again.
I just want to practice medicine in Leesburg, Ala., he said earlier this year. They are the ones that are really suffering.
The doctor, who has treated more than 900 patients, has said he was caught up in the Oxycontin scare and misled by the experts.
They said it was the best medicine in the world and theres no way in the world you can abuse it and things like that and then once you get into trouble for it, well, thats too bad.
They dont tell you all the bad part. .. Id practiced medicine for 18 years.
I had never been sued, period. I have never had a malpractice lawsuit. As soon as all of this happened, bam!
Among Dr. Herreras supporters were Leesburg Mayor Ed Mackey and members of the Town Council, who wrote a letter on his behalf