The 94-year-old actor was admitted to the city-based Lilavati Hospital in suburban Bandra on Wednesday morning for treatment of dehydration and a urinary tract infection.
The family friend, Faisal Farooqui, shared an update about Kumar's health on the actor's official Twitter page.
"Dilip Saab is doing much better now. Please remember him in your prayers. -FF," he posted.
"The excellent team of doctors and staff of Lilavati Hospital along with Saira Baaji are caring for Dilip Saab 24x7. -FF."