Gujral, 93, was admitted to the Medicity Medanta Hospital here with a lung infection on Nov 19, and is still on the ventilator.
"He is very critical, medicines are not showing much effect, good wishes can help him better," a senior medical consultant, who did not wish to be named, told IANS.
Another senior consultant at the hospital termed Gujral's condition "critical but stable".
"The condition of the former prime minister is critical but stable and changing minute by minute," admitted the consultant, also speaking on the condition of anonymity.
A team of nine senior consultants headed by Dr. Naresh Trehan is keeping a close watch on the patient, he added.
Photos: Salman Khan returns from Jodhpur to Mumbai
15 'peach' perfect photos of Priyanka Chopra at People's Choice Awards 2017
Photos: Tennis legend Andre Agassi meets Rahul Dravid in Mumbai
62 going on 16: These photos of Rekha prove she is 'forever young'
Photos: 10 times 'Sultan' Salman Khan wrestled with the law