Kauvery Hospital, where he is undergoing treatment, says that he was admitted for optimisation of nutrition and hydration.
He is stable and is being treated.
He will remain in the hospital for a few days, hospital sources added.
The DMK supremo was being treated for allergy a few days back.
He was being treated at home.
However, this morning he was shifted to the hospital for further treatment.
His son and DMK treasurer MK Stalin is at the hospital with his father.