In a fiery rebuke to Pauline Hanson's bill to remove vaccine mandates on Monday morning, Senator Lambie said the party was using fear to boost its election campaign.
"You have freedom to make a choice, but those choices have consequences. You cannot call the consequences of every choice 'discrimination'," Senator Lambie told parliament.
"You are choosing to do something that puts other people's lives at risk and you will be held accountable for that choice."
Senator Lambie said she does not support forcing people to be vaccinated, but does not support the bill because the decision to not get vaccination was not "consequence-free".
"It is called being a bloody adult."
Attending parliament by video link, Senator Hanson said vaccine mandates had unleashed a "pandemic of discrimination" in Australia as she talked up vaccination side effects and unproven COVID-19 treatments.
She took aim at state premiers for introducing mandates and adopted the prime minister's position about Australians having had a "gutful" of governments telling them what to do.
Senator Hanson also called Scott Morrison weak for not putting his money where his mouth is after he denounced mandates but would not legislate to remove state versions.
"If the prime minister is not happy with my bill then change it. You have the solicitor-general (to provide advice)," she said.
Queensland Nationals senator Matt Canavan also called vaccine mandates "unfair, cruel, unnecessary and unAustralian".
He said the bill would benefit with some amendments but he would vote for it regardless.
"I thought I was born in a free country," Senator Canavan said.
The government is facing an uphill battle in the Senate, with coalition senators Gerard Rennick and Alex Antic saying they will withhold their votes from all legislation unless mandates are scrapped.
Senator Hanson had promised to cause "mayhem" for the government over the issue, but could now back in government bills having had her draft laws debated.
Senator Rennick said while many jurisdictions had implemented mandates, he wanted the commonwealth to overrule state and territories.
"Where there is a risk there must be choice," he told the Senate.
The senator called for the government's indemnity scheme to be expanded and said people who listened to the government had been scorned.
Finance Minister Simon Birmingham said the government would not seek to overhaul mandates while Treasurer Josh Frydenberg said the issue was for states and territories.
"The government won't be dictated to - we will do as we've always done, which is work with our health advisors," Senator Birmingham told ABC radio on Monday.
"What I urge any parliamentarian to do is not to hold one issue to another unrelated issue, each piece of legislation ought to be considered on its merits."
Labor senator Kristina Kenneally launched a scathing rebuke, saying the government had "dog whistled to extremists" for even allowing the bill to be debated.
Senator Kenneally says Labor supports vaccine mandates when they are guided by public health advice.
Five coalition senators voted the bill be read a second time, including senators Canavan, Rennick, Antic, Concetta Fierravanti-Wells and Sam McMahon.
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