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So let's figure out what we can do to really help those in pain: Here are the players:
I. acetaminophen (Tylenol®)
II. non-steroid anti-inflammatory drugs
A. Ibuprofen (Motrin®)
B. Ketorlac (Toradol®)
III. hydrocodone/acetaminophen (Vicodin®, Norco®)
IV. oxycodone/acetaminophen (Percocet®, Roxicet®)
V. morphine (MS Contin®)
VI. hydromorphone (Dilaudid®)
A. 10mg inj morphine = roughly 1mg inj.hydromorphone
VII. oxycodone (oxyCONTIN®)
VIII. meperdine (Demerol®)
IX. fentanyl (Sublimaze®)
A. 100x stronger than morphine, but an rapid half-life
There’s a lot more, but I’m no pharmacist (I don’t think I could even play one on TV)…so let’s look at these patient populations:
MINIMUM dosing for morphine is 0.1mg/kg IV! (children and adults)
If you have a 300lb. female who presents with abdominal pain, 4 of morphine just isn’t going to cut it. In fact, 1mg of hydromorphone may not either…
300lb/2.2= 136kg x 0.1mg/kg= 13.6mg morphine
hydromorphone- 0.0125 mg/kg IV
300lb/2.2= 136kg x 0.0125mg/kg= 1.7 mg hydromorphone
Children
Acetaminophen- 15mg/kg PO
Ibuprofen- 10mg/kg PO
Intranasal fentanyl- 1-2mcg/kg
Intranasal fentanyl is a great way to take the “edge off” if you need to do a procedure on a little kid. Give a lil’ spray in each nostril, stick a lollipop in their mouth, and call it a day (personally I'm 0/2).
Another option is intranasal midazolam (Versed) 0.5mcg/kg (maximum dose 10mg/kg)
Adults
Avoid Ibuprofen if concerns for GI bleed/diverticulitis/ulcers (think elderly)
Acetaminophen has concerns for hepatotoxicity in doses greater than 4g/day
RUQ pain
I added this section as a little reminder, there are concerns with giving morphine and spasm of the sphincter of Oddi. This MIGHT exacerbate pain for someone with biliary colic/gallbladder disease or pancreatitis. In the end it’s your clinical decision, and I’ve seen providers give morphine without problems. Try D/C home with ibuprofen 400mg PO for pain, Vicodin® for severe pain.
Alternatives:
Meperidine 50-150mg slow IV push (Beware: serotonin syndrome!)
Ketorlac (Toradol®)- 30-60mg IM
hydromorphone- 1-2mg IV
Don’t forget to make these patients NPO and hydrate!
morphine has been considered standard treatment for chest pain (remember M.O.N.A.?) for two reasons:
Step 1: Treating pain will decreased anxiety. Decreasing anxiety will calm patient down and reduce catecholamine secretion.
Step 2: Decreasing catecholamine secretion will lower heart rate and blood pressure. This will allow for improved blood flow and help maintain perfusion in a heart may have been damaged by infarction.
2-4mg IV q5-15 mins., can increase 2-8mg until pain relief.
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You can give a 100lb. patient 2mg Dilaudid without breaking a sweat, but discuss this with your attending/supervising physician first!
Side effects:
Please don’t forget nausea/vomiting is a common complaint, especially for the opioid naive. Anti-emetics should routinely be dosed with narcotics:
Ondansetron (Zofran®) 4-8mg ODT (avoid in those with arrhythmia)
Metoclopramide (Reglan®) 10mg inj.(great for those with gastroparesis, constipation. Beware dystonia)
Promethazine (Phenergan®) 12.5-25mg inj. (Beware x 2! for dystonia)
Sedation, monitor your patients. Please don't turn them into respiratory depression...
Pain scale:
Ketorlac→ Morphine → Hydromorphone → Lorazepam (Ativan®)
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Allie Brosh |
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There’s also the topics of conscious sedation, but that is beyond me and I would refer to your attending/supervising physician.
References:
http://www.med.umich.edu/1info/FHP/practiceguides/pain/dosing.pdf
UptoDate®
Cline, D.M., Ma, O.J., Cydulka, R.K., Meckler, G.D., Handel, D.A., & Thomas, S.H. (2012). Tintinalli's Emergency Medicine Manual (7th ed.) McGraw Hill Professional: Columbus, OH.
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