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: Shraddha Kapoor, Kim Sharma at 'Haseena Parkar' screening
Mumbai to Goa train: First look at the glass-top Vistadome coach
Shuttler Ashwini Ponnappa keeps it short and sexy on social media
Photos: Narendra Modi, others at Marshal Arjan Singh's funeral
Photos: Sussanne Khan and Nimrat Kaur spotted at a spa in Juhu