It is not the first time Prof Nutt has been at odds with government policy.
There are few differences in the scientific opinions held by Prof Nutt and Prof Iversen.
Race two saw Lowry beat Amor with Anstey completing the podium and Nutt, Donald and Dunlop the next finishers.
But things were getting better, according to Nutt and Carnival spokesman Vance Gulliksen.
Among his challengers are expected to be TAS Suzuki duo Tom Sykes and Bruce Anstey and former winner Marty Nutt.
First, the body's work has fallen behind schedule because of the row and subsequent resignations over Professor David Nutt's sacking.
Brent Nutt said his wife, Bethany -- who is on board, and whom he talked to Sunday -- reported similar problems.
Mr Johnson said Prof Nutt had "crossed the line between offering advice and then campaigning against the government on political decisions".
When he announced his plans for the group, Prof Nutt said it would take over the science role of the ACMD.
Marty Nutt was third and Adrian Coates fifth in the R1 Cup while Ian Lowry was fifth and Nutt seventh in Supersports.
Five members of the council have now resigned following Prof Nutt's dismissal.
Professor David Nutt, a professor of neuropsychopharmacology at Imperial College London, has spent much of his recent career, aptly, driving British politicians crazy.
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Participant Anna Tees-Nutt, 32, from Sutton Coldfield, told the BBC News website there had been a huge range of different opinions and experiences.
BBC: NEWS | UK | UK Politics | 60 voters discuss policy at No 10
"The odor is so bad, people are getting sick and they're throwing up everywhere, " said Brent Nutt, whose wife is aboard the ship.
After being sacked via e-mail by Mr Johnson, Prof Nutt predicted there would be further resignations from the government advisory body that he headed.
"The odor is so bad, people are getting sick and they're throwing up everywhere, " Brent Nutt, whose wife is aboard the ship, said Tuesday.
Dr Les King quit the Advisory Council on the Misuse of Drugs (ACMD), saying Home Secretary Alan Johnson had denied Prof Nutt's "freedom of expression".
If so, Professor Nutt appears to have scored an own goal.
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Nutt said his wife tells him the boat isn't listing as much as it was Sunday, when she called worried she was going to die.
Professor Nutt has, laudably, staked the credibility of science in public policy on getting politicians to put away their moral sentiments and face up to statistics.
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Brent Nutt told the Associated Press that while those on board were being fed, his wife, a passenger, told him the vessel was becoming increasingly dirty.
The model used by Professor Nutt et al. only looks at harm, and it weighs the harm of alcohol to others more than it does to oneself.
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British championship hopeful Lowry won the first Supersport race by nine seconds from Donald, Keith Amor was third, Marty Nutt fourth, Dunlop fifth and Derek Shiels sixth.
At the same time, Prof Nutt is launching his own rival drugs body, which includes other eminent scientists and will lobby for changes based on its expert opinions.
But things were getting better, according to Nutt and Gulliksen.
Meanwhile, Hilton Hincks, Marty Nutt, Richard Britton, Marshall Neill and Michael Swann will be among the main contenders at Monday's rounds of the Irish Superbike Championship at Nutts Corner.
But Brent Nutt, who is not on board, told a local news station that his wife was a passenger and that she had no access to running water or a bathroom.
Prof Nutt said this meant "we have no-one now looking at that vast group of people who prescribe drugs and advise people about drugs, drug harms from the over-the-counter and prescription side".
His main challengers will include road race specialists John McGuinness and Ian Hutchinson, Dennis Hobbs, Steve Brogan and Hudson Kennaugh, with Castlerock's Marty Nutt and Omagh's BJ Toal also in the field.
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