The incident occurred when he was standing with other dignitaries for the National Anthem at the convocation function of the Mahatma Phule Krishi Vidyapeeth (MPKV) Agricultural University.
He was taken to a government guest house and examined by a team of medicos.
A diabetic patient, Gadkari's condition was stated as "stable" by his Bharatiya Janata Party colleagues.
He himself tweeted later: "Had slight medical condition due to low sugar. I have been attended by doctors and I am doing well now. I thank all of you for all the well wishes."
Party colleagues said his gruelling daily schedules may have taken a toll on his health which resulted in his collapse.
Gadkari is known to maintain a stringent 18-hour schedule starting at 6 a.m. with yoga and his working day continues well past midnight.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)