Whitney Houston’s final autopsy report states that the singer drowned face down in a tub of hot water about 12 inches deep.

The Los Angeles County coroner had ruled that Houston's death was an accidental drowning with the "effects of atherosclerotic heart disease and cocaine use" as contributing factors.

“This theory she had some sort of heart problem - I take issue with that,” HLN’s Dr. Drew said Wednesday night. “She had minimal heart disease on this autopsy report. Sixty-percent [narrowing of her arteries] is something that no doctor would do anything with because it’s harmless. You would watch it over the next 10 to 20 years.”

Along with cocaine, the toxicology report listed other drugs in her body, including marijuana, the anti-anxiety drug Xanax, the muscle relaxant Flexeril and the allergy medicine Benadryl.

“There’s some other clue in here - Her being upside down in the bathtub [and] low levels of Xanax in her blood in spite of the empty pill bottles at her bedside which should have had large amounts of Xanax in it,” Dr. Drew said.

Shelly Sprague, resident technician of "Celebrity Rehab" furthered the thought. “I think what we’re looking at is possibly some type of seizure that [caused] her to flip over,” she said.

Dr. Drew interjected, “I think that's exactly right. Here’s a way to induce a seizure … by not taking Xanax - by not taking it for a period of time - the blood levels go low. Cocaine induces seizures as well. Cannabis is of no help here. So she’s on all things that can create seizures. Everything looks like she had a seizure and their saying heart disease.”

He added, “She had no booze in her blood ... another thing that can cause a seizure is the booze coming out of your system. She may have been trying to get off some of these things and needed more medical supervision.”

Houston won six Grammys and sold 170 million albums, singles and videos over the course of her career.

“This is a very sad story,” Dr. Drew concluded. “Addiction kills people by so many different means. And that is what this is - another addiction death."

Watch Dr. Drew weeknights at 9 p.m. ET on HLN and follow the show on Twitter @DrDrewHLN.

HLN’s Dr. Drew talks to Bill Maher about Trayvon Martin’s death which sparked a conversation about racism in America. Bill Maher says this case is an example of “new racism”.

Watch Dr. Drew weeknights at 9 ET on HLN and follow the show on Twitter @DrDrewHLN.

Super Bowl winning quarterback Drew Brees of the New Orleans Saints talks to HLN's Dr. Drew about how parents can get their kids motivated.

RadarOnline.com's Senior Executive Editor Dylan Howard reported on HLN’s Dr. Drew Thursday night that Whitney Houston’s only child Bobbi Kristina is engaged.

"We had family sources confiding to us on Sunday that Nick Gordon proposed to Bobbi and she said ‘yes',"Howard said.

He added, “the family is concerned that this man has proposed to Bobbi after she inherited the entire estate.”

Last Tuesday, Bobbi Kristina and Gordon were seen kissing and holding hands as they were grabbing lunch in a video posted on TMZ.

Gordon is described as Whitney Houston's "adopted son" because she reportedly took him in when he was just 12 years old because of issues in his own family, TMZ reports.

When Bobbi Kristina's grandmother, Cissy Houston, allegedly saw the video, she told a friend "what they're doing is incestuous,” the site says.

HLN's Dr. Drew and his guests discuss the matter in-depth in the video clip above.

Watch Dr. Drew weeknights on HLN at 9 ET and follow the show on Twitter @DrDrewHLN.

*Editor's note: HLN has not independently confirmed claims made by RadarOnline or TMZ.

HLN’s Dr. Drew speaks to Whitney Houston's former sister-in-law Monique Houston.

She knows a lot about the Houston family dynamic. Monique comments on Oprah's interview with Whitney and Bobby Brown's daughter Bobbi Kristina as well as her ex-husband Gary Houston’s struggle with addiction and alcohol abuse.

Monique stayed with Dr. Drew after the show went off the air and revealed family secrets that have never been talked about before. Click here to see the exclusive behind-the-scenes video.

Monique Houston was once married to Whitney's brother, Gary.  She tells Dr. Drew what she knows about intervention efforts in the 1990s. It's her first interview since the singer's death.

And Dr. Drew is answering your questions about red meat. It's making news today. Should you eat it?

Watch Dr. Drew tonight and every weeknight at 9 on HLN

Whitney Houston’s only child Bobbi Kristina tells Oprah that she hears her mother's voice.

Is this normal grieving behavior? Is it just a way to cope with her mother’s death, or is the grieving daughter hallucinating?

HLN’s Dr. Drew and his special guests discuss the issue.

Patricia Houston, manager and sister-in-law of Whitney Houston, has spoken out for the first time since the pop icon's passing.

Patricia Houston says she does not believe the singer was taking drugs prior to her death.

However, HLN's Dr. Drew says a recovering addict should never even have a drink! Hear his full explanation in the video clip above.

Conservative talk show host Rush Limbaugh found himself in the hot seat last week.

During his radio program, he called Georgetown law student Sandra Fluke a "slut" after she testified in front of a congressional committee about why her Catholic university health insurance should be allowed to cover contraception costs.

Famed attorney Gloria Allred has thrown herself into the mix. She sent a letter to the Palm Beach County attorney's office Thursday asking prosecutors to consider a charge under a law from 1883 making it a misdemeanor to question a woman's chastity.

Does this case stand a chance? HLN's Dr. Drew and his guests weigh-in on the matter.