The 42-year-old actress is currently shooting in Kashmir for Vishal Bhardwaj's 'Hiader'.
Tabu had to be taken to a hospital on February 21 and she got released by the evening and returned to shooting.
"Tabu was hospitalised here on Friday and kept under observation for three hours. She was discharged in the evening," an official of the Sher-e-Kashmir Institute of Medical Sciences (SKIMS) hospital here said.
He said the actor was complaining of some breathing problems due to inhalation of smoke on the sets of 'Haider'.
The film also which stars Shahid Kapoor, Shraddha Kapoor and Irrfan Khan. It is based on Shakespeare's tragedy 'Hamlet'.