My wife has a chronic pain situation and was prescribed Fentanyl Patch 25 mcg. She put one on on Sunday and started itching on Monday and became very sedated. She took Benadryl for the itching which seemed to make it tolerable. She felt the dose was too much right now so we are trying to figure out how to reduce the amount of drug released from the patch.

Someone suggested a small piece of Saran wrap over part of the patch.

Any thought on how to reduce the amount of drug released from the patch as it really helped her pain.
Thanks