A man charged with supplying methylamphetamine across Newcastle and Lake Macquarie told police he was also consuming a gram of the drug a day, Newcastle court heard.
Police stopped a vehicle driven by Matthew John Dries on Chatham Road, Broadmeadow just after noon on Tuesday.
Officers searched the vehicle and seized a quantity of substance believed to be methylamphetamine.
Dries, 36, of Georgetown Road, Georgetown, appeared in court on Wednesday charged with 28 counts of supplying prohibited drug and the ongoing supply of a prohibited drug.
It is alleged he supplied methylamphetamine to clients at Cardiff, Georgetown, Newcastle, Hamilton, Mayfield, Waratah, Merewether, Charlestown, Wickham and Broadmeadow in December 2018 and January 2019.
The court heard that Dries, who did not enter pleas to the charges, admitted to police that he was using a gram of methylamphetamine a day.
Police opposed bail based on the strength of he prosecution case and the high likelihood that he would reoffend if released.
Police evidence included text messages, phone intercepts and personal intercepts with people who had just purchased drugs.
Magistrate Andrew Eckhold acknowledged that Dries had indicated he wised to participate in a rehabilitation program, but noted the cased against him appeared to be "utterly overwhelming".
He said Dries would most likely face a custodial sentence if convicted.
Bail was refused and the matter was adjourned until April 10.
Shortly after Dries was arrested on Wednesday police executed a search warrant at a home on Georgetown Road, Georgetown, where they located a 44-year-old man, and two women, aged 21 and 50.
Officers seized a substance believed to be methylamphetamine and property suspected to have been stolen.
The trio were each issued Future Court Attendance Notices for the offence of possess prohibited drug.
The 50-year-old woman will appear at Newcastle Local Court on Thursday 7 March 2019.
The 44-year-old man and 21-year-old woman will appear at Newcastle on Thursday 28 March 2019.
The occurred as part of Strike Force SERMELFI, which was established in September 2018 to investigate prohibited drug supply in the Newcastle area.