Medication·Interactions·Reviewed June 9, 2026
Famciclovir interactions.
Famciclovir has 6 documented interactions in the NutriStack database. The full interaction list is below. None of this is a substitute for your prescriber's advice.
Famciclovir at a glance.
A quick, data-grounded summary. The full tables are below.
Famciclovir has 6 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 famciclovir.
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 |
|---|---|---|
| Creatine | Caution | Creatine can raise measured serum creatinine and complicate renal assessment for Famciclovir, which depends on kidney function for dosing or... |
| Green Tea Extract | Caution | Concentrated green tea catechins such as EGCG inhibit aldehyde oxidase in vitro, the same enzyme responsible for converting the prodrug famciclovir... |
| Magnesium Glycinate | Caution | Famciclovir absorption is not dependent on gastric acidity and it does not chelate divalent cations in a clinically significant way, so magnesium... |
| Probiotics | Caution | Famciclovir is generally well tolerated and, unlike antibacterial agents, does not disrupt the gut microbiome, so it does not kill probiotic... |
| Quercetin | Caution | Famciclovir is an inactive prodrug that must be converted to its active form, penciclovir, largely by the enzyme aldehyde oxidase. Quercetin... |
| Vitamin C | Caution | Very high-dose vitamin C can increase urinary oxalate burden, which is undesirable in patients needing renal dose adjustment for famciclovir. |
The full famciclovir profile.
Uses, typical dosing, side effects, and the cited evidence for this medication.
Common famciclovir questions.
Quick answers drawn from the tables above.
What interacts with Famciclovir?
In the NutriStack database, Famciclovir has 6 documented interactions. The most notable include Creatine, Green Tea Extract, Magnesium Glycinate, Probiotics, and Quercetin. Check any specific combination before taking it and confirm with your prescriber.
Is it safe to take Creatine with Famciclovir?
NutriStack classifies the Creatine and Famciclovir pairing as caution: Creatine can raise measured serum creatinine and complicate renal assessment for Famciclovir, which depends on kidney function for dosing or toxicity monitoring. Tell the prescriber about creatine use and avoid creatine loading during acute illness, kidney injury, or therapy requiring close renal dosing. Always confirm with your prescriber.
Check your whole stack
See how famciclovir fits your supplements.
NutriStack screens your full routine for interactions and depletions, and updates the moment you change it.