Medication·Interactions & depletion·Reviewed June 9, 2026
Ceftriaxone interactions.
Ceftriaxone has 3 documented interactions in the NutriStack database, including 1 flagged to avoid or as a serious conflict. Prolonged use is also associated with lower Vitamin K. The full interaction list, depletion table, and replacement suggestions are below. None of this is a substitute for your prescriber's advice.
Ceftriaxone at a glance.
A quick, data-grounded summary. The full tables are below.
Ceftriaxone has 3 documented interactions in the NutriStack database, including 1 flagged to avoid or as a serious conflict. Prolonged use is also associated with lower Vitamin K. The full interaction list, depletion table, and replacement suggestions are below. None of this is a substitute for your prescriber's advice.
Substances that interact with ceftriaxone.
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 |
|---|---|---|
| Calcium | Contraindicated | Ceftriaxone and calcium-containing IV fluids can form insoluble ceftriaxone-calcium precipitates in lung and kidney tissue, with fatal cases... details → |
| Vitamin K2 | Caution | Ceftriaxone suppresses vitamin K-producing gut bacteria and has been associated with hypoprothrombinemia and bleeding, particularly in malnourished... details → |
| Probiotics | Synergy | Probiotic supplementation during ceftriaxone therapy reduces antibiotic-associated diarrhea and helps preserve gut microbiome diversity. This is... details → |
What ceftriaxone can deplete.
Nutrients this medication is associated with lowering over time, with the mechanism, a suggested replacement where one applies, and the biomarker to monitor. Discuss any replacement with your prescriber first.
| Nutrient | Severity | How it happens | Replace with | Monitor |
|---|---|---|---|---|
| Vitamin K | Mild | Broad-spectrum antibiotic exposure can suppress gut bacteria that synthesize menaquinones, lowering vitamin K availability in susceptible patients. | – | PT/INR |
The full ceftriaxone profile.
Uses, typical dosing, side effects, and the cited evidence for this medication.
Common ceftriaxone questions.
Quick answers drawn from the tables above.
What interacts with Ceftriaxone?
In the NutriStack database, Ceftriaxone has 3 documented interactions. The most notable include Calcium, Vitamin K2, and Probiotics. Check any specific combination before taking it and confirm with your prescriber.
Which substances should I avoid with Ceftriaxone?
Ceftriaxone is flagged against 1 substance in the database, including Calcium. These pairings carry a higher risk and should be reviewed with a clinician before combining.
Does Ceftriaxone deplete any nutrients?
Ceftriaxone is associated with lowering Vitamin K with prolonged use. Useful biomarkers to monitor include PT/INR. Ask your prescriber before adding any replacement supplement.
Is it safe to take Calcium with Ceftriaxone?
NutriStack classifies the Calcium and Ceftriaxone pairing as contraindicated: Ceftriaxone and calcium-containing IV fluids can form insoluble ceftriaxone-calcium precipitates in lung and kidney tissue, with fatal cases reported in neonates. The... Do not infuse IV ceftriaxone with calcium-containing IV solutions, especially in neonates. Oral calcium supplements are generally acceptable but... Always confirm with your prescriber.
Check your whole stack
See how ceftriaxone fits your supplements.
NutriStack screens your full routine for interactions and depletions, and updates the moment you change it.