Judged: two independent readers; copy check clear.
fentanyl
fentanyl Fentanyl is a very strong opioid pain-relieving drug that mainly acts on mu-opioid receptors.
Fentanyl is a very strong opioid pain-relieving drug that mainly acts on mu-opioid receptors. In mental health contexts, it is relevant because misuse can lead to habituation or addiction.