Are you a medical marihuana patient facing criminal charges for a non-drug related crime? If so, and you are convicted (by plea or other determination), you can face severe penalties in sentencing.
Most sentencing terms (that do not include jail time) require random drug testing. If a random drug test is positive or you skip the drug test you can face jail time or the original punishment for the crime (particularly if you entered a plea deal). Failing to successfully complete the terms of your sentencing can have very negative consequences.