This is a bit off topic, but according to wikipedia; "Adverse reactions to adrenaline include palpitations, tachycardia, arrhythmia, anxiety, headache, tremor, hypertension, and acute pulmonary edema."
I've always thought that a true straight-edge person wouldn't deliberately trigger adrenaline releases. The fact that your body produces it given a particular stimulus doesn't seem to really be relevant to the "goodness" of the substance. If your body produced cocaine when you get in a mosh pit is that different than just taking cocaine?
Adrenaline doesn't have any long-term health risks, unlike cocaine. If cocaine was safe in the long run, and I found that I didn't get negative side-effects and it helped me do <x>, I'm not sure what the downside would be in me using cocaine.
When I used to be a singer I personally found adrenaline would only come with more important performances (bigger concerts, live radio), never with smaller concerts on recording sessions - I never experienced any downsides, and it helped me do better. If I could have found a way to get an adrenaline rush all the time, I definitely would have grabbed it with both hands.
edit: Given the topic of this actual thread, an interesting side-note is that despite never having problems with music, I'm pretty terrible at public speaking.
I've always thought that a true straight-edge person wouldn't deliberately trigger adrenaline releases. The fact that your body produces it given a particular stimulus doesn't seem to really be relevant to the "goodness" of the substance. If your body produced cocaine when you get in a mosh pit is that different than just taking cocaine?