"He did not tell him where he had been and he didn't think it was the first time Parker had used cocaine," Bates wrote in his findings.
"[Friend] noticed that Parker was becoming sleepy, so he encouraged him to lie down on the couch.
"[Friend] sat with Parker and talked with him for about 15 to 20 minutes. He said although he was engaging in conversation he seemed 'really wasted'.
"Parker then grabbed his chest, began fitting and it appeared that he was struggling to breathe."
His friends placed him in the recovery position and called an ambulance.
Ambulance staff performed resuscitation for about 40 minutes but it was ultimately unsuccessful.
Police investigated and found his death was not suspicious and there was no evidence of foul play.
Toxicology analysis carried out by ESR confirmed Parker had a blood alcohol level of 127 mg per 100ml of blood. The adult legal limit for driving is 50mg.
MDMA is classified as a mild to moderate central nervous system stimulant with hallucinogenic properties. A level of 0.3 mg/L was found in Parker's blood.
"This level of MDMA has been associated with both recreational use and MDMA-related deaths," the coroner said.
ESR advise that toxicity due to MDMA was "variable among individuals" and there was significant overlap between concentrations associated with minimal toxicity and concentrations associated with fatal overdose.
Pathologist Dr Arendse said MDMA initially flooded the brain with serotonin - giving people a sense of wellness, connection and empathy which days later leads to what's known as "suicide Tuesday" due to the comedown symptoms which include depression, lethargy, low motivation, somnolence and fatigue.
Mixing alcohol and MDMA was "very risky" and could extend or enhance the feelings from MDMA but also increased cardiac stress and toxicity leading to heart-related toxicity, leading to possible cardiac arrhythmia or stroke.
In Arendse's opinion, Parker died due to acute cardiac failure secondary to cardiotoxic effects.
"The combination of alcohol and MDMA increased Parker's heart rate, cardiac arrhythmia, high blood pressure and dehydration."
Coroner Bates accepted those findings and wanted to create awareness around the lethal combination which led to his death.
He said the "clear dangers of consuming recreational drugs, including methamphetamine, were well known and publicised but "that was not necessarily the case with MDMA, widely known as ecstasy".
"Although MDMA is a derivative of amphetamine and can be very harmful, it seems to enjoy a reputation as a 'good time' or party drug that attracts relatively little negative attention."
Bates hoped that by highlighting Parker's death it could prevent similar incidents happening in the future.
"It is my hope that this will go some way towards preventing further harm to the public."
