What is the latest regarding involuntary intox? I have a trial on Monday. The defendant is going to testify that he consumed zanix instead of an aspirin. Any advice would be appreciated.

This case might be helpful.
http://www.2ndcoa.courts.state.tx.us/opinions/HTMLOpinion.asp?OpinionID=15945

You need a copy of Richard Alperts book. Look at pages 95 and 177-178 for good discussions on Synergistic effect. Also,as the new DWI resource Prosecutor with TDCAA, I would love to take a few minutes off from reading seminar papers and creating power point to be a sounding board. Call 512-474-2436 if you are so inclined.