Bobbi Kristina was abusing heroin, cocaine and other drugs

                 Bobbi Kristina Brown, like her doomed mom Whitney Houston, was using drugs before she was found unconscious in a bathtub, according to People magazine.

The 21-year-old daughter of Houston and R&B singer Bobby Brown was regularly taking heroin, cocaine and Xanax in the months before she was rushed to a Georgia hospital on Jan. 31, the magazine reported.

Xanax was one of the drugs found in Houston’s system after she drowned in a bathtub at a Beverly Hills hotel on Feb. 11, 2012.

A source told People that Bobbi Kristina, in the weeks before the tragedy at her home in Roswell, Ga., was “distraught” about the coming third anniversary of her mother’s death.

The aspiring singer/actress was also in and out of rehab for her demons — including heavy drinking — since her mother’s death, the source indicated.

Bobbi Kristina was hospitalized for depression almost immediately after Houston passed away.

“This girl was trying hard, but she didn’t have any support system,” the source told People. “She was still dealing with a lot of grief over her mother.”

Toxicology reports on Whitney Houston showed the singer had marijuana, Xanax, the muscle relaxant Flexeril and the over-the-counter medication Benadryl in her system at the time of her death.

Bobbi Kristina remains in a medically-induced coma at Emory University Hospital in Atlanta three weeks after she was discovered by her boyfriend Nick Gordon.

Family members, including Bobby Brown and Bobbi’s grandmother Cissy Houston, kept a grim bedside vigil as they prayed for a medical miracle.

But medical experts warned that the long-term coma was likely to cause other issues, including blood clots, bladder infections and pneumonia."