Cocaine and alcohol when used in the same session produce a third substance called cocaethylene. This is a toxic substance and can cause strokes and heart attacks, as well as damaging the liver, in even supposedly healthy people. A&E staff use a term called 'coke stroke'.
We have just published our new cocaethylene awareness and harm reduction leaflet which outlines the risks and offers advice on how to get your alcohol and cocaine use under control. Please feel free to submit a product review, we would appreciate the feedback.
There is very useful report, in PDF format, which you can download, titled 'Responding to combined alcohol and cocaine use' you may find this useful if you need more detailed information.