The sugar levels of Reddy have come down due to the fast though other parameters like blood pressure were normal this morning, they said.
He has refused to be put on intravenous fluids, they said.
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Police last night shifted Jaganmohan Reddy from the Chanchalguda jail here to the state-run Osmania General Hospital amid heavy security.
The jailed Kadapa MP, who has been lodged at the Chanchalguda Central Prison since May last year after his arrest by the CBI on corruption charges, launched an indefinite fast last Sunday.