Former prime minister Manmohan Singh is stable and underobservation at the AIIMS here after suffering reaction to a new medication anddeveloping fever, hospital sources said on Monday.
The 87-year-old Congress leader was admitted to the hospitalon Sunday evening after he complained of uneasiness.
The sources said that Singh had developed a reaction to anew medication and further investigation is being carried on him to rule outother causes of fever.
"Dr Manmohan Singh was admitted for observation andinvestigation after he developed a febrile reaction to a new medication,"the sources said.
"He is being investigated to rule out other causes offever and is being provided care as needed. He is stable and under care of ateam of doctors at the Cardiothoracic Centre of AIIMS," they said.
"All his parameters are fine. He is under observationat the AIIMS," a source close to him has said.
Singh, a senior leader of the opposition Congress, iscurrently a Member of Rajya Sabha from Rajasthan. He was the prime ministerbetween 2004 and 2014.
In 2009, Singh underwent a successful coronary bypasssurgery at the AIIMS.
A number of leaders expressed have expressed concern overhis health and wished him a speedy recovery.