Here's one: MDMA and raspberry ketones.
I almost fucking died. So, I had been taking this fat-interceptor, which is called cyclodextrin. It's very interesting stuff- and while it's in Febreeze, it's in there because the molecule (cyclodextrin) has a unique ability to surround other molecules. Fat being one of them. Bad smells in the air. There are alpha and beta kinds, and there are some initial promising reports that it can clean out your arteries and get them to a point that your body can take over removing the arterial build up. But I digress. Anyway, I was about 6 foot, 230, and although I hid it really well and everyone never believed me that I weighed that much, I was using the cyclodextrin to lose weight. And it works, it binds with fat. The downside, it gives you the shits. However, if you're on opiates, it's fucking great, because it's a natural fiber. Okay sorry I'm on a tangent again. So one day, when reordering the cyclodextrin, I saw they had a raspberry ketone version. I was like "hey I've heard about this shit, I'll order that one." Big fucking mistake.
So I started taking the cyclodextrin with the raspberry ketones. It caused me to be a little stressed, as I mentioned above. Unfortunately at the time, I didn't make the connection. So we got a hold of some MDMA, and my friends and I tried it. This was BEFORE the raspberry ketones. We only took a half, and it was fine. Very mellow, not much, but that's how we roll with Molly- we're not like going full tilt. Just an enhancer. So one night my buddies want to take some and go to the bar. Sure, so I take one. A whole one. Earlier that day I had taken the CD/RK combo with a meal, and that actually did pass before my consciousness. So anyway, at the bar, I start to freak out. Something is not right. I chalk it up to being in a social environment, but of course that doesn't make a lot of sense with Molly. Nonetheless, only moderately worried, I walked home. And from there, the nightmare began.
TL;DR: DON'T TAKE MDMA WITH RASPBERRY KETONES: HEART THUMP
All I can tell you, is that mixing raspberry ketones with MDMA almost killed me. How, you ask? By causing my heart to pump HARD. And when I say hard, I mean my ticker was thumping like a freight train. I was convinced I was going to die of a heart attack. Some of you may be likening this to snorting a little too much blow. Yeah, no, this was 10 times worse. And trust me I know. I've done many lines of blow that were too much. That usually settles after 20 minutes or a little longer. This didn't. This went all night. I contemplated going to the emergency room. I contemplated that this was it, I'm going to die. I laid in my bed, doing nothing, practicing breathing exercises (inhale, ultra slow exhale). Showered in ice cold water. Yeah, nothing helped. So for like 6 hours, that's what I went through. After I came out of it, my heart was still beating a little bit hard. Finally, it dawned on me, what had I been doing different? The ketones. Fucking raspberry ketones. This may sound like a joke, but if I can save your life, then you're welcome. Don't fuckin risk it. In fact, don't do any stim with raspberry ketones. After googling the side effects (which I should have fucking done in the first place, yeah I'm a dumbass), it all became crystalline clear. I went to the ER two days later, convinced I had had a heart attack. 800 dollars later and several medical tests, Doc said heart was fine. I dodged a major bullet, and I'm way more careful nowadays.