A GP and former co-op chair who prescribed diazepam and tramadol to a 13-year-old patient has been reprimanded and suspended for six months.

The Victorian Civil and Administrative Tribunal found the GP guilty of professional misconduct for his “clinically inappropriate” and “excessive” prescribing of drugs of dependence to eight patients of a general practice co-op in Melbourne’s inner west.

The tribunal also imposed conditions on the 61-year-old GP for when he returned to practice, including a ban on prescribing S8 drugs and benzodiazepines, and supervision of his work.

One of the patients was just 13 when the doctor, a former chair of the co-op, prescribed her diazepam and tramadol, while another was prescribed drugs of addiction for over 13 years, the tribunal heard.