A Calhoun County doctor has had his medical license suspended, while the state of Michigan carries out an investigation into his prescribing of drugs.

The Michigan Department of Licensing and Regulatory Affairs says on Wednesday that Frederick Grove prescribed controlled substances, particularly things like opioids and muscle relaxers, in dosages and combinations that can be dangerous. The Battle Creek Enquirer says that according to the LARA complaint, 60 percent of all drugs he prescribed between October 1, 2016 and August 15, 2017 were for drugs like methadone and hydrocodone. Furthermore, a large number of his patients paid with cash.

He previously had his medical license suspended for opioid related reason.

LARA records show that Grove’s license was suspended in 2006, after it was determined he had been prescribing himself codeine and Vicodin; he told investigators he was using up to 40 pills a day at the time. His license was eventually reinstated with restrictions in 2010.

Grove works at the Francis St. Medical Associates in Albion. This current suspension is temporary while the investigation is carried out.