MONTPELIER (AP) - Officials at Vermont health centers say they've seen an increase in relapse rates for drug addicts.

Fighting drug addiction in the state has become a key goal for Gov. Peter Shumlin's administration.

Valley Vista CEO Jack Duffy tells the Burlington Free Press (http://bfpne.ws/1easBLi ) that the number of patients requiring readmission in the last six months has more than doubled.

Maple Leaf Farm Executive Director William Young says relapse rates at his facility have one gone up by more than 100 percent.

Both say the spiraling relapse rates are the result of a new state Health Department rule requiring pre-approval for patients staying longer than 15 days.

State health officials say shorter stays are designed to help manage costs and improve efforts to move patients from detoxification to long-term recovery.