As speculation continues about the cause of the singer's death, gossip website TMZ reported that some of her prescriptions were filled out at the infamous Mickey Fine pharmacy, which was raided in 2009 by the DEA for evidence of 'improper dispensing of controlled substances', in connection with the death of Michael Jackson.
These reports have yet to be confirmed.
Jackson was said to have received from the Beverly Hills pharmacy the highly addictive Demerol - one of the drugs which was alleged to have contributed to his death - and agents believe it may have refilled prescriptions without a doctor's authorisation.
It took nearly three months for the coroner to officially rule on Michael Jackson's death which was eventually determined to be from 'acute propofol intoxication' and two other drugs.
Mickey Fine's is thought to have been the go-to pharmacy for both singers who are believed to have spent thousands of dollars there.
Some of the prescriptions found in the crack cocaine user's hotel room were reportedly issued in 2011, but some were believed to have been more recent.
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The amoxicillin was recently prescribed to Houston for a sore throat, sources told TMZ.
A coroner ruled today that it was impossible to ascertain the exact cause of the singer's death but ruled out foul play.
Houston's family was allegedly told by Los Angeles County Coroner officials there was not enough water in her lungs to conclude she had drowned in her luxury hotel bathtub and in fact died before her head went under water, said TMZ.
Los Angeles assistant chief coroner Ed Winter refused to go into details and said toxicology reports will not be available for several weeks, making it impossible to pinpoint the exact cause of death.
He confirmed to ABC that officials found prescription bottles, but said there wasn't anything 'alarming' or 'out of the ordinary' about them.
Though there were reports she had drowned, or overdosed, he said they won’t make a final determination until 'all the tests are in'.
He said: 'No matter what medications they're taking, until we run a (toxicology test) and see the level and what's in the system, we're not going to speculate.'
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Law enforcement sources said it is possible the singer suffered a heart attack as a result of the cocktail of drugs she had taken.
While questions remain about what happened prior to her death, photographs shed some light on the singer's last minutes.
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