Not true, Blood tests will not show levels of narcotics, only trace or presence. Either way, if you have a valid perscription, it is not illegal to operate a motor vehicle (or heavy machinery) while under the influence of that substance. That's why the warning labels say "use caution while" instead of "do not"! The best they can do is reduce it to a careless driving (for the reported lane weaving) and let it go. As for the cop and your husband...The cop has a right to know anything he feels is pertinent to an investigation, and the hospital has a duty to dicsclose most of that info., but if I were you I would just focus on beating these BS charges and just forget about everything else. You don't want to stir the pot at this point! Just get your legal issues handled and forget about it.