Endocrine/Metabolic: Cases of serotonin syndrome, a possibly lifetime-threatening situation, have been documented throughout concomitant use of opioids with serotonergic prescription drugs. A probably fatal symptom complicated in some cases often called Neuroleptic Malignant Syndrome (NMS) is documented in association with promethazine HCl alone or together with antipsychotic medicine... https://promethazine-quagen25702.blogdemls.com/30043545/quagen-pharma-promethazine-fundamentals-explained