Tags: Drug.
Phenazocine (brand names Prinadol Narphen) is an opioid analgesic drug which is related to pentazocine and has a similar profile of effects.Effects of phenazocine include analgesia and euphoria also may include dysphoria and hallucinations at high doses most likely due to action at κ-opioid and σ receptors.Phenazocine appears to be a much stronger analgesic with fewer side effects than pentazocine probably due to a more favorable μ/κ binding ratio.