I recently got a prescription for cough syrup containing Hydrocodone and Homatropine, I have one refill and I will probably only use half of the first one. I thought it might be a good item to keep in storage for emergencies later on. Does anyone have any ideas how long this stuff will last before you shouldn't use it anymore? Is it possible to use this for pain relief even though it is in syrup form? I know you have to be careful not to take too much at one time I'm just wondering if it could be used to relieve pain in an emergency.