Antiemetic Drugs Flashcards
▪Serotonin Receptor Antagonists
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
d. dronabinol (Marinol®)
e. scopolamine
f. meclizine (Antivert®), dimenhydrinate, hydroxyzine
g. Ginger
h. Doxylamine + Vitamin B6 (Pyridoxine)
a. ondansetron (Zofran®)
▪Dopamine Antagonists
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
d. dronabinol (Marinol®)
e. scopolamine
f. meclizine (Antivert®), dimenhydrinate, hydroxyzine
g. Ginger
h. Doxylamine + Vitamin B6 (Pyridoxine)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
▪Cannabinoids
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
d. dronabinol (Marinol®)
e. scopolamine
f. meclizine (Antivert®), dimenhydrinate, hydroxyzine
g. Ginger
h. Doxylamine + Vitamin B6 (Pyridoxine)
d. dronabinol (Marinol®)
▪Anticholinergic Drugs
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
d. dronabinol (Marinol®)
e. scopolamine
f. meclizine (Antivert®), dimenhydrinate, hydroxyzine
g. Ginger
h. Doxylamine + Vitamin B6 (Pyridoxine)
e. scopolamine
▪Antihistamines
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
d. dronabinol (Marinol®)
e. scopolamine
f. meclizine (Antivert®), dimenhydrinate, hydroxyzine
g. Ginger
h. Doxylamine + Vitamin B6 (Pyridoxine)
f. meclizine (Antivert®), dimenhydrinate, hydroxyzine
▪Morning Sickness
f. meclizine (Antivert®), dimenhydrinate, hydroxyzine
g. Ginger
h. Doxylamine + Vitamin B6 (Pyridoxine)
g. Ginger
▪ ? (also a prokinetic)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide
c. Metoclopramide
Unpleasant feeling that often precedes vomiting
Nausea
Retching
Emesis (vomiting)
▪ Nausea
Diaphragm, chest/abdominal wall contractions
Nausea
Retching
Emesis (vomiting)
▪ Retching
Forcible emptying of gastric, and occasionally, intestinal
contents
Nausea
Retching
Emesis (vomiting)
▪ Emesis (vomiting)
Which is three stages of Emesis
Nausea
Retching
Emesis (vomiting)
Hypertension
Nausea
Retching
Emesis (vomiting)
USED TO TREAT Chemotherapy induced N/V) Post-Op Radiation/anesthesia N/V a. ondansetron (Zofran®) b. phenothiazines- promethazine, prochloperazine c. Metoclopramide (also a prokinetic
a. ondansetron (Zofran®)
ADVERSE EFFECTS
▪ QT prolongation-meaning risk for torsades de pointes (remember
this is an additive effect with other drugs)
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
a. ondansetron (Zofran®)
▪ QT prolongation
▪ Diarrhea
▪ Headache (fairly common!) and Dizziness!
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
a. ondansetron (Zofran®)
GIVE 1 HOUR PRIOR TO CHEMOTHERAPY!
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
a. ondansetron (Zofran®)
Also, make sure to give early (premed) for exposure (such as for chemo or for surgery)
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
a. ondansetron (Zofran®)
Ondastreton
Chemotherapy
PRE-MEDICATE!
? hour prior to start of chemotherapy
FOLLOW UP!
Give another round ? hours after chemotherapy
Give another round ? hours after chemotherapy
PRE-MEDICATE!
1 hour prior to start of chemotherapy
FOLLOW UP!
Give another round 4 hours after chemotherapy
Give another round 8 hours after chemotherapy
MECHANISM OF ACTION: 1) Primary mechanism: antagonist at D2 receptors in the brain (CTZ) a. ondansetron (Zofran®) b. phenothiazines- promethazine, prochloperazine c. Metoclopramide (also a prokinetic
b. phenothiazines- promethazine, prochloperazine
ADVERSE EFFECTS ▪Extrapyramidal Symptoms (EPS) a. ondansetron (Zofran®) b. phenothiazines- promethazine, prochloperazine c. Metoclopramide (also a prokinetic
b. phenothiazines- promethazine, prochloperazine
◦ BOXED WARNING: tissue injury- extravasation
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
◦ BOXED WARNING: respiratory depression
resulting in death in pediatric patients (<2 years)
◦ Compounding effect with other meds, such as???
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
b. phenothiazines- promethazine, prochloperazine
Respiratory depression
resulting in death in pediatric patients (<2 years)
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
b. phenothiazines- promethazine, prochloperazine
Caution
◦ Benzos, Barbiturates, Booze (alcohol), Benadryl
a. ondansetron (Zofran®)
b. phenothiazines- promethazine, prochloperazine
c. Metoclopramide (also a prokinetic
b. phenothiazines- promethazine, prochloperazine