Bad experience with meph..
Okay, so early on Saturda afternoon (whilst at home) I bombed 250mg of meph. Long story short, I ended up doing an all nighter and consuming 2 grams over a 26 hour period, in 250 mg doses spaced a few hours apart. I always monitor my heart rate every so often, especially when judging whether or not I should redose. Pulse wasn't too bad, a little high but nowhere near as high as with other drugs.
By 3 pm the day after (about 26 hours after first dose), I didn't feel too bad, but I did notice a rather odd heartbeat, as if the rhythm was disrupted. It was. My pulse would shoot up, then slow right down...and this continued, until when, it stopped for a second, and then restarted again with a loud beat that I could actually hear ! When it restarted it hurt a bit too. This scared the hell outta me, so I spent the next 5 hours taking it easy on the sofa with my finger on my pulse, and a phone in my lap in case I needed to call an ambulance. For a few hours, I was really worried for my life.
Luckily since I was it the comfort of my own home, I wasn't doing anything that put any additional strain on my body.
The first time this phenomenon occured I'd hoped I'd just imagined it, but 4 hours later, it occured again - but by then my heart rhythm seemed to have recovered a bit (very little drug left in my system) and so I was somewhat reassured that I wasn't going to die.
The odd thing about the meph heartbeat is that it seems that it messes with the functioning of the heart, producing pounding beats rather than just fast beats. Something is off, it may or may not be the valve timing, but something isn't right, it also causes occasional pains.
I should also mention that I've never had any sort of heart problems that I know of, and there is no history of heart problems in my family. I'm also quite slim and reasonably fit.
So, thats it for me - time for a long, long, long, long break from stimulants.
Be safe, take it easy !