Dont over do your doses when you do use once a month. I was doing the same thing a few months back using sporadically after a long break. WHen I would really over do the coke I would like fuck the blood circulation up in my legs or something. My heart must have not been able to pump hard enough to circulate the blood... I dunno exactly, but the next day I would have the sorest muscles ever. I felt like i played 2 football games after sitting on the couch for a year. Turns out its a side effect, ill be it not so common.
During the years iv ebeen speedballing i have had really sore legs after a binge a few times but never put 2 and 2 together. Now I realize that if I keep my use moderate like i dont go for a bell ringer every time keep my use to maybe a 6 hour period rather than a 24 hour period of shot after shot, i get better results.
coke is BAD for your heart. it doesnt matter if you sniff it smoke it or shoto it, you are still doing damage. I think shoting it probably does the most... If you do some research you can find a study about the condition of the heart of middle aged coke users being that of a 70 year old. Dont quote me on those exact numbers...
Of course using any drug once a month is moderation in my opinion. A gram of coke can be a lot though if its very pure. The vials of coke i get from the delivery in nyc I get 10 speedballs out of which are legit ringers, and it never clocks in at a whole g.