Opioids Flashcards
Principal manifestation of opioids Overdose
Miosis, Coma, Hypoventilation
Patients with adrenal inufficiency (addisons disease) or hypothyrodism have what type of responses to opioids
Prolonges, Increased, exaggerated
Can opioids cross BBB
Yes
How do opioids treat acute pulmonary edema
decrease preload & afterload, reduce anxiety
Treatment for cough
codeine or dextromethorphan
Tx for post op shivering
Meperidine 25 mg IV (action on alfa 2 receptors)
Effects without tolerance of opioids
Bradycardia, Miosis, Constipation, Convulsions, Sweats
Which opioids attentuate neuroendocrine stress response
Fentanyl, sulfentanil
Opioids do what to labor
Prolong
Fentanyl, Meperidine, inhibit uterine contractibility
Most common effect of neuroaxial opioids
Pruritus, most common in OB patients
Opioid receptors are found
CNS & Periphery
WHere do opioid receptors work in spinal cord, step of ppain pathway
Modulation, Transmission, ??
Definition of nociception
Painful stimulus activates nocicceptors and is transported to the brain
IV Opioid antagonists
Nalaxone & Nalfeme (Naltrexone is PO)
Opioids are weak acids or base?
Weak base
Most lipid soluble
Sufentanil Fentanyl 2. Alfentanil
Opiod metabolism: tissue and plasma esterase
Remifentanil
Extremely short acting
Remifentanyl
At physiological pH has most nonioized fraction osea least ionized fraction
Alfentanil
Symptoms minimal or none to experience tolerance
miosis, convulsions, constipation
Opioid OD signs
Miosis, Hypoventilation, coma
Which metabolite causes liver failure and is more potent than mother?
M6G
Do not need to adjust dose in patients with hepatic failure
Remafentanil
Renal failure prolongs action of this metabolite
M6G
Opioids causing truncal wall rigidity
Fentanyl, Sulfentanyl, Alfentanil, rapid administration
Treatment for chest wall rigidity caused by opioids
NMB, Naloxone
Results in patietns with Addisons disease or hypothyrodism.
Prolonges, increased effects
Attentuates neuroendocrine stress response
Fentanyl and sufentanil