was hit by two coughing fits on Labor Day, with one taking four minutes during a campaign speech and the other on her plane

Hillary Clinton said she was feeling 'better' Tuesday after flooding her system allergy-fighting antihistamines.

'As I said, it, you know, it happens like crazy during the spring when the pollen comes, and it happens in the fall when the pollen comes,' she said.

'It lasts for a couple days and then it disappears.'

She said there's likely a large collection of videos 'going back decades' to corroborate her story.

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Taking questions: Hillary Clinton went into the reporters' section of her campaign plane for the second day in a row and claimed her health was fine, saying coughing was because of 'pollen'

Medicated: Clinton said she had taken antihistamines to deal with allergies which she blamed on pollen

'I'm sure that someone is compiling right now,' said the 68-year-old Democrat, whose health has been a frequent target for Republicans.

'Now the advice, of course, is just don't talk for a day or two,' she said. 'Yeah, that's not gonna work for me. Not gonna happen. I'm just gonna keep talking...power through.

She predicted, 'By tomorrow it will be fine.'

Clinton coughed and wheezed through her first speech of the day on Monday, pausing repeatedly to wet her whistle at a Labor Day festival in Cleveland, Ohio.

Later, she had to excuse herself mid-way through a media availability with reporters during a flight when the cough came back.

Despite having a bottle of water in her hands, she was handed another glass by an aide and then turned round and walked back to her section at the front of the plane.

She finished up the question and answer session when the plane hit the ground.

At the rally Clinton said she was having an 'allergic reaction' to Republican presidential nominee Donald Trump, also in Cleveland on Monday.

Trump's campaign manager, Kellyanne Conway, quipped that the coughing fit was a reaction to flying with the press for first time.

'I'm allergic to him. That's what I said,' Clinton told reporters Tuesday morning as her campaign plane was taking off for Tampa, Florida.

Hillary Clinton caught a case of dry mouth on Monday afternoon that caused her to choke and cough through the first few minutes of her stump speech at a Labor Day event in Ohio

Clinton washed down a throat lozenge after the coughing fit, which she comically wrote off as an allergic reaction to Donald Trump

Second attack: Hillary Clinton suffered another bout of coughing on Monday on her campaign plane when she went to speak to reporters

Handed glass: The candidate already had a bottle of water in her hand when she was handed a glass, apparently also containing water, and returned to her section of the campaign plane

Clinton's plane made its maiden voyage on Monday from White Plains, New York, to Cleveland.

The candidate came back to the press section to welcome reporters before the first flight and spoke to them at length from the aircraft between events in Ohio and Illinois that afternoon.

'I love having the plane. The plane makes everything so much easier,' she declared Tuesday as she surprised reporters for a second day in a row with a morning greeting.

As she did on Monday, Clinton promised to come back for a longer, more substantive chat, after reporters began throwing out questions that went beyond the scope of the conversation.

Before she left Clinton responded to an inquiry about her feelings about Trump's plane sitting on the tarmac when she arrived in Cleveland Monday.

'I didn't feel anything. Was I supposed to?' she asked.

She added, 'I've seen it before, he's flown it all over the United States, and it's usually parked where I'm about to take off from or land. I've never been on it.'