Crown prosecutor Anselm Williams said Musson first appeared in court in May on 291 charges of possession and supplying performance and image enhancing drugs.
He was due in court tomorrow on those original charges, brought by the Ministry of Health who helped police lay them under the Medicines Act 1981.
But police intercepted two packages sent by him on October 25, which they allege contained more home-made drugs.
Seven new charges claim Musson sold various tablets and vials under a 'Phoenix Biotech' brand before "provisional consent of the Minister of Health to the distribution of that medicine had been notified in the Gazette".
Police searched Musson's home in suburban Bishopdale, Christchurch earlier this year and found a large amount of raw material as well as manufactured medicine, and cash, Mr Williams alleged.
A number of packages allegedly sent by Musson to people around New Zealand had been intercepted by police, along with text messages.
"A lot of money is involved," Mr Williams said, adding that a jail sentence could be appropriate if the charges were proven.
A statement of facts provided to Judge Gary Macaskill contained 114 pages.
"The prosecution case is strong," Mr Williams said.
Duty solicitor Shannon-Leigh Litt today asked for Musson to be remanded on bail because he was self-employed as a sports coach and personal trainer, working 50 hours a week.
But Judge Macaskill refused, saying the alleged offending occurred while on bail for other matters which he said amounted to "blatant behaviour".
Musson was remanded in custody without plea until tomorrow when he will reappear on the original 291 charges.
He was named Mr New Zealand Athletic at the 2005 national championships, crowned Mr Christchurch Physique 2009 and competed in last year's National Amateur Bodybuilding Association Asia Pacific Bodybuilding champs.
