I shot rivotril from brazil. 2.5mg/ml. I added about 30 units of water to 70 units of "syrup". Completely pointless. No benefit whatsoever to iv and I'd say its horrible for your veins (I expect this is what you have).
Midazolam is water soluble, but only so much so as to fit a useful amount into a rig at a ph of around 3.5 to 5. So you will need an acid like citric or hcl.
Decent rush but you won't feel the urge to keep shooting it. It is ok, nothing special. Best used in combination with smack. they take away from a smack and coke speedball. All other benzos are pointless to shoot. With the exception of maybe flunitrazrpam, triazolam, nimetazepam and possibly temazepam I don't know,