The SNP will form a progressive alliance with other parties to "block government conservatives" if they gain enough seats to become rulers, the party leader said.
Nicola Sturgeon said other parties need to have the same level of commitment to the NHS if Scottish nationals are in a position to decide who can get the keys from Downing Street.
However, the party ruled out being in coalition, suggesting that it would pursue agreements on issues, while Sturgeon said it would not support parties that would not support a second referendum on Scottish independence.
Nicola Sturgeon campaigning earlier this week
She said: "If there is a suspended parliament, SNP lawmakers will try to form a progressive alliance to block government conservatives."
Sturgeon also made it clear that she is not a fan of Labor leader Jeremy Corbyn, whom she accused of not being able to give a direct answer as to whether the UK should leave the EU or not.
She added that the SNP will pledge to protect the NHS from trade agreements in the next parliament at the launch of the campaign in Edinburgh.
It comes as:
More on General Elections 2019
- The workforce has committed to extending the legal maternity pay and strengthening the right to flexible work.
- Boris Johnson announced plans for a new visa to attract doctors and nurses to the NHS
- Clacton's Labor candidate, Gideon Bull, gave up the race for denying calling a Jewish advisor "Shylock" at a council meeting.
- Liberal Democratic leader Jo Swinson is in Scotland saying voters who "despair" Brexit must support her party to prevent it
Sturgeon's party will introduce the NHS Protection Act to ensure that the health care system is not used as a "bargaining chip".
This comes amid concerns that the US would like to open the NHS to US health care companies after Donald Trump said "everything was on the table" for a trade deal.
Sturgeon claims that while the NHS is returned in Scotland, the UK government can still "sell" the NHS in trade negotiations.
Boris Johnson on his NHS visa pledge
Its bill also states that deconcentrated governments would have to ratify any trade agreement before it could go any further.
Conservatives and US President Trump said the NHS is not "available" in a future trade deal.
Sturgeon said the election is "the most important of our lives", adding "the future of our country is at stake".
She said Scotland was "on a journey," saying it was "more European" and naming important tax and health care policies.
Scottish National Party candidates before campaign launch
She said: "Many of the gains of the last 20 years and the promise of a better future are threatened.
"Scotland's vote to remain in the EU was ignored. For the first time, the UK government has chosen to legislate on deconcentrated issues without Holyrood's consent.
"The Conservatives' number one commitment is to get Scotland out of the EU, against our will.
"I doubt there is anyone in Scotland who is not tired of Brexit's nightmare.
"But the Boris Johnson deal doesn't conclude Brexit – it just opens the door for the next episode of the Brexit horror show.
"The Brexit agreement covers the terms of departure and not the future relationship.
Conservative candidate resigns
"In front of us would be many years of discussions about the future economic relationship of the UK, justice and security agreements, fishing, migration and much more.
"What we do know is that the Conservatives will pull Scotland out of the Customs Union and the Single Market, a trade bloc eight times larger than the UK."
On the Lib Dems, she said the party would prioritize control of Scotland at Westminster rather than hold it in the EU, even suggesting that the party would choose to let Scotland pass a Tory Brexit.
She said: "Westminster's priorities can be summed up in just three words – Brexit, Brexit, Brexit."
Sturgeon also vowed again to have a Scottish independence referendum next year, claiming that the SNP has a "cast iron mandate" for one because it won the Scottish Parliament election with this in its manifesto.
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