Information on the ECY stack:
Yohimbine HCl is added to Ephedrine and Caffeine
Yohimbine ≠ Yohimbe
Personally, I would not recommend doing the ECY stack, but if you are just so inclined to do it, go ahead and google how to run it. It would appear that the E+Y combination can be dangerous for your body. Yohimbine and Caffeine is a much better route to take if you are set on using yohimbine. There is a a bb.com thread about ECY you can google if you’re interested…
An excerpt from that thread: (Not saying this is true because I really don’t know if it is, just thought-provoking)
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NOTE: It is research-documented that alpha-2 adrenoreceptor antagonism initiates a cascade that diminishes beta-adrenoreceptor mediated lipolysis (re: fat burning). Remember, ephedrine is a beta-receptor agonist, so by taking E + Y together, you're basically taking three steps forward and then one step back. Perhaps even more importantly E & Y together = a ton of central norepinephrine relay to the HPTA, which is EXTREMELY bad for you long-term for the following reasons: 1. extremely vasoconstrictive, both in sections of the brain and periperhally, 2. (from 1) there will be a significant elevation in blood pressure, 3. the HPTA (hypothalamus-pituary-thyroid-axis) is basically the 'master control switch' for an innumerable number of the body's metabolic and endocrine processes. Whereas dopamine and serotonin convey to the HPTA that there is positive energy influx, NE/NA (norepinephrine) is a stress-hormone, which is perfectly fine in the short-term for reducing appetite, providing energy while hypocaloric, and causing weight loss. Too-much continual stress-hormone signaling to the HPTA means your body thinks it's starving, seriously. That's why--short term, Y + E work fine. Long-term, they will diminish fat-loss, because they will literally **** over your metabolism from top to bottom. You need to achieve neurotransmitter/catecholamine balance: epinephrine: norepinephrine: dopamine. Taking E + Y together radically tilts the scale in the direction of norepinephrine, which, as I said, will diminish lipolysis long-term and will eventually bring your diet to a screeching halt (unless you are using an exogenous source of dopamine like nicotine to correct this deficiency, and even here, I still do not recommend the pairing based on the other aforementioned reasons). Again, think about it, I'm talking about your HPTA. So that includes a.) thyroid, b.) pituitary (which releases GnRH which, downstream, regulates testosterone levels), c.) hypothalamus (your body's primary 'control panel'). These are not components in your body that should be taking lightly. This is why so many contest dieters are forced to take cytomel, or cannot get their dick hard: because their body is so convinced that they are starving that their HPTA-regulated processes have entirely bottomed out. I sincerely hope everyone can see the significance of this, in terms of the "big picture."