Hi there ~
I understand your concerns. It is not safe to shoot IV meth
in a syringe with blood and dope mixed together overnight. It may be fatal and depending on the dosages can be instantaneously lethal. I strongly suggest that you avoid this kind of usage. You may also be susceptible to HIV
and other infections as this is a high risk behavior. I hope you understand and kick the habit as your life is at stake. Please also consider visiting with a psychiatrist
to get back on the path of recovery.
I hope this helps. Take care and have a lovely day!