Dorian didn't simply trip once, he's done a lot of different hallucinogens and party drugs by his own admission. Someone said Nasser called Dorian the Nubain Warrior.
Of course Yates is now a major cannabis advocate. Ironically Nasser claimed he never did any drugs yet he died and Yates is going strong. I would also be very surprised if Ronnie isn't an addict right now, but he has a legit excuse for using painkillers. Matt said:
Recall the pill container he had, where he was medicated for just about everything, and the interview with Dave Palumbo in New York where Ronnie pulled out a bottle of morphine pills, which he said don't even work for him anymore. 
Yep! Here is the video. For simplicity sake, I have set the link for the video to start at the time that Ronnie pulls out the pill bottle, if you click on the link below. If you click on the video, go to 5:25 in, where Dave brings up Ronnie's pain, and subsequently asks him about whether or not Ronnie takes pain medication. Dave asks some interesting questions starting at 4:50 in, but 5:25 is when the issue of pain is brought up:
=5m25s
Haha, wow that took a while for me to dig up - I had initially mistaken it for "Ronnie Coleman & Victor Martinez Talk At The 2015 Natural Vitamins Monster Event!" See, I do offer some quality to this board - I hope those who find me to be an annoying autistic can see that.

I had totally forgotten that Ronnie was asked by Dave, point blank, about painkillers.

As for Ronnie's prescriptions, check it out here - Ronnie was [is?] on quite the stash. It's not the worst, but it's certainly some indication that Ronnie had some issues/concerns during his competitive heyday. Obviously the man has the constitution of a horse though, and as I said, he has had a great life:
My uncle was 56 when my grandfather passed away - he pulled out a bottle of Morphine and showed the family like it was no big deal. So opiate use is all over the place these days - White people are currently experiencing an opioid crisis so it is a pretty major thing. Both doctors and lawmakers, as well as police, are basically overwhelmed trying to reduce consumption of opiates, but it is turning out to be yet another case of "treat the symptoms" - opiates are technically treating the symptoms of the problem, and taking them away is yet again not addressing the root cause of these issues to begin with. I think as White people continue to get displaced demographically, we will see more of these issues emerge.
In any case, opiate use is so common, that it is no shock to me that Rich Piana used them as well. His ex-girlfriend told me he would do as many as ten Oxycontin 80s in a day. Which, given his body weight, is not a surprise to me. Oxycodone also has this diminishing return aspect that makes it very different from, say, hydromorphone.
A person who does ten Oxycontin 80 pills is probably 80% as high as he is going to get on two pills, and does the next eight pills just to get 20% higher. It's a diminishing returns issue, in addition to being an 80/20 issue So as said, Rich could have probably done two [or given his body weight, maybe 3-4] Oxycontin 80s, and been almost as high as he would have been from ten Oxycontin pills. Also, the new pharmacies simply haven't been making Oxycontin as good as Purdue Pharma did - presumably due to lower quality in other aspects of production, such as binding agents and fillers that are in the pills.
Opiates alone wouldn't be a major concern to me, but if Rich was doing both opiates and cocaine - taking his heart and his central nervous system for a ride both DOWN and UP - that would be a different matter to me, and definitely worse for his health than just one or the other. My friend from university [who ultimately died due to a combination of 10+ Oxycontin 80 pills taken intravenously, in addition to prescription sleeping pills] told me that he had spoken to a professor at the university [who himself did opiates regularly/weekly, even at the university itself, lol] who said that among his friends from the 1960s, those who did opiates in higher than average quantities were still alive, but those who did cocaine in high dosages passed away. To do both at the same time is a particularly bad combination.
RIP Rich Piana.