Ondansteron: Difference between revisions
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==General== | ==General== | ||
*Type: | *Type: [[antiemetics]] | ||
*Dosage Forms: | *Dosage Forms: 4mg, 8mg | ||
*Common Trade Names: Zofran | *Common Trade Names: Zofran | ||
==Adult Dosing== | ==Adult Dosing== | ||
*Nausea/Vomiting: 4- | *Nausea/Vomiting: 4-8mg q4h, max 24mg a day | ||
==Pediatric Dosing== | ==Pediatric Dosing== | ||
*Nausea/Vomiting: 0. | *Nausea/Vomiting: 0.1mg/kg IV q4h max dose at once:4-8mg, max 24mg | ||
*Gastroenteritis - Vomiting | *Gastroenteritis - Vomiting | ||
**8 to 15 kg: | **8 to 15 kg: | ||
*** | ***2mg orally disintegrating tablet dissolved orally as a single dose | ||
**15 to 30 kg: | **15 to 30 kg: | ||
*** | ***4mg orally disintegrating tablet dissolved orally as a single dose | ||
**Greater than 30 kg: | **Greater than 30 kg: | ||
*** | ***8mg orally disintegrating tablet dissolved orally as a single dose | ||
==Special Populations== | ==Special Populations== | ||
*[[Drug Ratings in Pregnancy|Pregnancy Rating]]:B | *[[Drug Ratings in Pregnancy|Pregnancy Rating]]: B | ||
**Consider avoiding in 1st trimester; conflicting data regarding possible risk of teratogenicity | |||
**Newer data argues that ondansetron is not the cause of birth defects<ref>Fejzo MS, et al. Ondansetron in pregnancy and risk of adverse fetal outcomes in the United States. Reprod Toxicol. 2016 Jul;62:87-91.</ref> | |||
*Lactation:safety unknown | *Lactation:safety unknown | ||
**Adult: | *Renal Dosing: | ||
* | **Adult: not defined | ||
**Pediatric: not defined | |||
*Hepatic Dosing: not defined | *Hepatic Dosing: not defined | ||
** | **Adult: not defined | ||
**Pediatric: not defined | |||
* | |||
==Contraindications== | ==Contraindications== | ||
*Allergy to class/drug | *Allergy to class/drug | ||
* | *Congenital long QT syndrome | ||
*Serotonin syndrome | |||
==Adverse Reactions== | ==Adverse Reactions== | ||
===Serious=== | ===Serious=== | ||
| Line 36: | Line 40: | ||
*torsades de pointes | *torsades de pointes | ||
*serotonin syndrome | *serotonin syndrome | ||
*extrapyramidal | *extrapyramidal symptoms | ||
*blindness, transient | *blindness, transient | ||
===Common=== | ===Common=== | ||
| Line 54: | Line 58: | ||
==See Also== | ==See Also== | ||
==References== | |||
<references/> | <references/> | ||
[[Category:Pharmacology]] | [[Category:Pharmacology]] | ||
[[Category:GI]] | |||
Latest revision as of 12:23, 6 March 2021
General
- Type: antiemetics
- Dosage Forms: 4mg, 8mg
- Common Trade Names: Zofran
Adult Dosing
- Nausea/Vomiting: 4-8mg q4h, max 24mg a day
Pediatric Dosing
- Nausea/Vomiting: 0.1mg/kg IV q4h max dose at once:4-8mg, max 24mg
- Gastroenteritis - Vomiting
- 8 to 15 kg:
- 2mg orally disintegrating tablet dissolved orally as a single dose
- 15 to 30 kg:
- 4mg orally disintegrating tablet dissolved orally as a single dose
- Greater than 30 kg:
- 8mg orally disintegrating tablet dissolved orally as a single dose
- 8 to 15 kg:
Special Populations
- Pregnancy Rating: B
- Consider avoiding in 1st trimester; conflicting data regarding possible risk of teratogenicity
- Newer data argues that ondansetron is not the cause of birth defects[1]
- Lactation:safety unknown
- Renal Dosing:
- Adult: not defined
- Pediatric: not defined
- Hepatic Dosing: not defined
- Adult: not defined
- Pediatric: not defined
Contraindications
- Allergy to class/drug
- Congenital long QT syndrome
- Serotonin syndrome
Adverse Reactions
Serious
- bronchospasm
- steven-johnson syndrome
- QT prolongation
- torsades de pointes
- serotonin syndrome
- extrapyramidal symptoms
- blindness, transient
Common
- headache
- constipation
- fatigue
- hypoxia
- fever
- urinary retention
- agitation
Pharmacology
- Half-life: 4.6-5.7 hour
- Metabolism: liver
- Excretion: urine
- Mechanism of Action:selectively antagonizes serotonin 5-HT3 receptors
See Also
References
- ↑ Fejzo MS, et al. Ondansetron in pregnancy and risk of adverse fetal outcomes in the United States. Reprod Toxicol. 2016 Jul;62:87-91.