Medication·Interactions·Reviewed June 9, 2026
Ondansetron interactions.
Ondansetron has 3 documented interactions in the NutriStack database. The full interaction list is below. None of this is a substitute for your prescriber's advice.
Ondansetron at a glance.
A quick, data-grounded summary. The full tables are below.
Ondansetron has 3 documented interactions in the NutriStack database. The full interaction list is below. None of this is a substitute for your prescriber's advice.
Substances that interact with ondansetron.
Every supplement and medication in the NutriStack database with a documented interaction with this drug, highest-severity first. Open any pair for the mechanism and sources.
| Substance | Interaction | What happens |
|---|---|---|
| Magnesium Glycinate | Caution | Ondansetron can prolong the QT interval and rare cases of torsades de pointes have been reported, especially with IV dosing or predisposing risks.... details → |
| Potassium | Caution | Ondansetron can prolong QT interval, and hypokalemia makes drug-induced torsades de pointes more likely. Vomiting and diarrhea can lower potassium... details → |
| Ginger Extract | Synergy | Ginger has randomized-trial and meta-analysis evidence as an adjunct to standard antiemetic regimens for chemotherapy-induced nausea and vomiting.... details → |
The full ondansetron profile.
Uses, typical dosing, side effects, and the cited evidence for this medication.
Common ondansetron questions.
Quick answers drawn from the tables above.
What interacts with Ondansetron?
In the NutriStack database, Ondansetron has 3 documented interactions. The most notable include Magnesium Glycinate, Potassium, and Ginger Extract. Check any specific combination before taking it and confirm with your prescriber.
Is it safe to take Magnesium Glycinate with Ondansetron?
NutriStack classifies the Magnesium Glycinate and Ondansetron pairing as caution: Ondansetron can prolong the QT interval and rare cases of torsades de pointes have been reported, especially with IV dosing or predisposing risks. Low magnesium is a... Do not take high-dose magnesium without medical advice, but maintain normal magnesium intake while using ondansetron if you have ongoing GI losses... Always confirm with your prescriber.
Check your whole stack
See how ondansetron fits your supplements.
NutriStack screens your full routine for interactions and depletions, and updates the moment you change it.