That's really funny you say that. I micron filter it and everything and after awhile I thought I was doing serious damage to my heart because I was getting pains leading up my arm, into my shoulder, up my neck and into my heart. It also really hurts my stomach but I was in classic denial and thought it was something else coz it's happened with meth too.
I used to use this every day when I was a teen. Id mix 40mg methylphenidate, 80-160-240mg OxyContin or equivalent amounts of Mscontin or eventually heroin(depending on my tolerance at the time)and 2-6mg Xanax an hour before. Usually 25-50mg of Phenergan too, not IV'd tho neither was the Xanax. And it was a fantastic pharma-speedball!.
Now I only ever need 20-30mg methylphenidate and I have a significant methamphetamine tolerance which I didn't back then and I never got the vein and vascular discomfort back then. Now it's very noticeable and I've been doing it for 6 weeks max.
I think now that I can get coke that gives a bell ringer at 60mg I might just swap over to that. Most of the "quality" coke here seems to need 150-200mg for a mere rush and that outrageous imo. Plain, thievery.
I'm going to start buying 1/2g heroin which is 4-5 average shots, 2-3 potent shots and hg of coke which is actually with the price from this guy(I asked for a sample of 0.1g the other night, made one 60mg and one 40mg shot. Started with the 60mg and holy fuck! YES!!! This is what I'm chasing!!!! The second one was great but caused significant nausea which the first didn't but finally! Coke that I can shoot or freebase if I choose! Not just buy then end up disappointed within 30 mins. I might be of the rarities that can leave it too. I had one then the other 5 hours later!
1/2g heroin given me 1 strong shot and either 2-3 weaker ones and the 0.5g coke gives me around 8 shots. A few 60mg ones and a few 80mg maybe + ones. So a few strong ones with the H and the milder ones in between. Or maybe just buy 0.8g, make 0.55g into freebase and make 0.25g into 1x 50mg, 1x60mg and one 2x70mg for the first one of the night along with 150mg h and either 4mg Xanax(which is so far from real,tbh I have no idea what it is) or 3mg kpin which feels, the dose range and duration seems to line up with what real Clonazepam would match up with.
Next week with my partner I plan to buy 0.5g H, 0.5g coke, 10 2mg kpins, 6 150mg MD Caps, 2 120ug cat in the cat LSD tabs, a g of ket, talk of nos, couple grams of bud, g of hash and camp somewhere secluded with my man for 2 nights. I might have some shrooms picked by then too.
Build a bonfire on the beach, pump our speaker, enjoy the weather. Have the psychs night one, and relax night 2. Classic candy flip, nos, ket and pot at the end and a relaxing time. Then wake n bake, enjoy a stroll n swim. Benzos, relax with my sweetheart and then late Arvo start on the harder stuff though il get my partner meth coz I'm to scared coke will be too hard on his body. Then when my coke has worn off I can scab his meth lol of course saving a decent shot of h for after our wonderful time together. Maybe even spend one last night recovering there just smoking, strolling, taking pics and whatever else.
... Huge temptation to just keep going but that way I end up finding it pretty useless 
... But I'm not gonna step back tonight...