Ford, 71, is expected to be discharged from the hospital soon, but needs rest before resuming work, reported Mirror.
"At the moment it looks like Harrison is going to be off set for 6-8 weeks but the main priority is making sure he is OK," a source said.
The film's shooting reportedly suffered initially due to Ford's absence, but now things are said to be under control as there are many actors in the movie, whose scenes can be shot now.
"There are lots of other actors in the movie so it is not a disaster. We are still confident the film can stay on schedule," the source said.
Meanwhile, Ford's wife Calista Flockhart said at the weekend she is flying out to the UK to be by his side.
Ford is reprising his role as Han Solo in 'Star Wars' sequel, scheduled for release in December next year.