What kind of interaction is it?

Synergy: a documented combination effect that is stronger or more useful than either substance taken alone.

Is this interaction backed by published research?

Yes. NutriStack lists 2 citation rows for the Acyclovir + Quercetin pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Interaction databaseSupplement × PrescriptionReviewed May 2026

Acyclovir and Quercetin, a synergy.

Q: Can I take Acyclovir and Quercetin together?

Yes. The combination of Acyclovir and Quercetin produces a measurable benefit. Quercetin has demonstrated antiviral activity against HSV-1 in vitro and in animal models, primarily by interfering with viral attachment and replication. While clinical trials in HSV are lacking, the mechanism is non-overlapping with acyclovir, and combination use during recurrent outbreaks is biologically plausible and low-risk at typical supplement doses.

Q: How does this affect a NutriStack Stack Score?

+2 to your Stack Score per scored synergy row.

Quercetin has demonstrated antiviral activity against HSV-1 in vitro and in animal models, primarily by interfering with viral attachment and replication. While clinical trials in HSV are lacking, the mechanism is non-overlapping with acyclovir, and combination use during recurrent outbreaks is biologically plausible and low-risk at typical supplement doses.

2 primary source citations. Emerging evidence. Last verified May 30, 2026.

Open the interaction checker →Read the methodology

One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.

Sourcing standards·Evidence tiers

From the interaction database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.

At a glance

Substances: Acyclovir and Quercetin
Pair type: Synergy
Evidence (highest tier): Emerging
Source citations: 2 sources
Stack Score effect: +2 to your Stack Score (per scored synergy row).
Scope: Supplement × Prescription
Last verified: May 30, 2026

Synergy · Emerging evidence

Synergy

What is happening. Quercetin has demonstrated antiviral activity against HSV-1 in vitro and in animal models, primarily by interfering with viral attachment and replication. While clinical trials in HSV are lacking, the mechanism is non-overlapping with acyclovir, and combination use during recurrent outbreaks is biologically plausible and low-risk at typical supplement doses.

Mechanism. Quercetin disrupts HSV attachment, entry, and replication in vitro. Acyclovir is phosphorylated by viral thymidine kinase and inhibits DNA polymerase. The mechanisms target different steps of the viral life cycle.

Recommendation. Quercetin 250-500 mg/day is reasonable as an adjunct during HSV outbreaks while taking acyclovir. Do not use quercetin as a substitute for prescribed antiviral therapy.

Sources (2)

Stack Score

How this pair moves the number.

Effect on the composite score

If both Acyclovir and Quercetin are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).

The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.

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