Possible cutting agents for the following fatal causes?

Hello everyone. I have a question about the designer drug "Bromazolam." I ordered it in powder form from the legal internet about a week ago and shared it with a good colleague at his request, but it all ended badly. He consumed a decent amount of it in my presence during the late shift at work because he really wanted to try it, despite my strong advice against it. I didn't take anything yet, though, as I had reserved a special day for it. After about one to two hours, my colleague collapsed. He repeatedly tried to get up, but each time he fell over again, as if he were extremely drunk. When he didn't wake up and lay motionless on the floor, I put him in the recovery position because he was choking violently. I then called an ambulance. He was taken immediately, and the current status is that he has been transferred from the intensive care unit to a psychiatric ward because he was using confusing words that lacked meaning and context. I felt like I had committed murder. My colleague at work has two children and a wife, which made me feel even worse. When I got a call from my brother the next day around mid-afternoon, telling me that my colleague hadn't woken up since the previous evening, I felt extreme anxiety and guilt and just couldn't take it anymore. This led me to an impulsive decision and subsequently consumed the same substance, only in a much smaller amount because I thought my colleague had overdosed, which later turned out not to be the case. Suddenly I got the same symptoms as my colleague: everything went small and I couldn't control my muscles and I collapsed several times until I fell asleep. I took the stuff at around 9 pm and was woken up the next day at 5 pm by my mother banging on my door because she was worried. I asked her to call an ambulance, which she did immediately. In the ambulance, I confessed everything to the paramedics, and they treated me on the way to the hospital. I handed the medication over to the hospital. The next day, I went to my family doctor, who told me that it wasn't the bromazolam itself, but that it was all caused by an unknown cutting agent. Now my question is: does anyone know what kind of cutting agent it was that could have caused such devastating effects? And, above all, will my work colleague recover?

Thank you in advance!