A former Adelaide doctor jailed for trying to murder a pharmacist after she reported him to the authorities for overprescribing medication has lost his bid to reduce his decade-long sentence. Brian Holder, 69, was found guilty of attempted murder over a revenge attack on a Port Lincoln pharmacist at her workplace in October last year. He was sentenced to 15 years in jail with a non-parole period of 10 years for the attempted murder, but appealed against that decision. The Court of Criminal Appeal has now thrown out that appeal.