lecture 4 Flashcards
opioid use disorder diagnostic criteria:
pattern of opioid use leading to problems or distress, with at least two of the following occurring within a 12 month period
characteristics of opioid use:
- rapid development of tolerance which develops to the euphoric effects as well as to other side effects like nausea.
- uncomfortable withdrawal with chronic use which is not usually fatal unless has disease
synthetic opioids (fentanyl) were the:
leading cause of drug related death at the start of pandemic
potency:
amount of drug needed to produce an effect
efficacy:
ability of a pharmaceutical drug or medical treatment to produce a desired therapeutic effect when administered under controlled conditions
affinity:
ability of the drug to get to and bind to the receptor
how many binding pathways does fentanyl have?
multiple
how many binding pathways does heroine have?
one
why are opioids so additive?
we have an endogenous opioid system where endorphins, enkephalins, and dynorphins bind and activate opioid receptors widely in brain and spinal cord and sometimes gastrointestinal system
opioids bind to receptors that are in high concentration in:
ventral tegmental area and project to the noradrenaline
when drugs stimulate opioid receptors in brain, cells in the VTA produce:
dopamine and release it into nucleus accumbent giving rise to feelings of pleasure
dopamine neurotransmitters receives signals through opioids and translates it into:
a memory and motivation signal and creates that pain or pleasure
acute withdrawal syndrome symptoms:
gastrointestinal distress, thermoregulation disturbances insomnia, joints and muscle pain, dysphoria, restlessness, anxiety
post acute withdrawal syndrome symptoms:
mood disturbances (anxiety, depression), sleep problems, fatigue
clinical opiate withdrawal scale:
11 item scale that rates common signs and symptoms of opiate withdrawal and monitor these symptoms overtime