Bobbi Kristina Brown remains in a medically induced coma at an Atlanta hospital after doctors reportedly tried taking her off various medications.
A source close to the 21 year-old's family said doctors were forced to put her back on the drugs because she began suffering seizures, CNN reports.
"This is a horrible setback. Everyone was hopeful that this was the sign that she'd turned the corner. We were so optimistic," the source added. "Bobby is taking this so hard; he was sure this was going to be a good day."
Bobbi Kristina Brown, the daughter of Whitney Houston and Bobby Brown, has been hospitalized since being found unresponsive in a bathtub at her home in Roswell, Georgia, last month.
Last week, an Associated Press source said doctors replaced her breathing tube with a tube usually used for patients who need to be on a ventilator for an extended period.
Brown's partner, Nick Gordon, who is reportedly at odds with Bobby Brown over hospital visitation, has been sending a flurry of tweets recently about Brown and her family and says she would want him to.