In one embodiment, {HEAD ~ the method} can additionally include forming {TAIL ~ a barrier layer} on at lease a selected portion of the reservoir region for reducing the rate at which the active ingredient is released from the reservoir region 
additionally include forming
In one embodiment , { HEAD ~ the method } can additionally include forming { TAIL ~ a barrier layer } on at lease a selected portion of the reservoir region for reducing the rate at which the active ingredient is released from the reservoir region
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH