"During shoots I used to get both mentally and physically drained. For every scene, I had to bring the demon in me, which is not my personality in real life," Ameesha said in an statement.
After reaching home, "I used to be so exhausted that I didn't have the energy to do anything," she added.
"This was the most challenging role for me. This film has a mix of emotions, it has adultery, blackmailing, love and passion," said the 37-year-old.
"Shortcut Romeo" is a remake of Ganeshan's super hit Tamil film "Thiruttu Payale" and it is slated to release June 21.