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OpenEvidence Prompting Playbook: Evidence-First Questions That Reduce Hallucinations

A non-clinical prompting framework for OpenEvidence: how to ask, what to avoid, and how to force citations and traceability in outputs.

Review date
Jan 2026
Reading time
10 min read
Author
Dr Kola Tytler MBBS CertHE MBA MSt MRCGP
On this page
Career toolkitPractical prompts and templates for applications, portfolios and professional development. Check local employer and regulator requirements before use.
This page is about getting better outputs from an evidence-first medical AI search tool—without turning your workflow into a research project. The goal is: reproducible prompts, explicit citations, and clean verification habits.

Default posture: treat AI as a fast librarian

You are not asking for ‘truth’. You are asking for: (1) likely references, (2) a structured summary, and (3) uncertainty flagged clearly.

Prompt patterns that work (copy/paste structure, not content)

1

Pattern 1 — Define the output format first

Start with: “Return: 5 bullets, then a 3-row table, then the top citations.” Format constraints reduce rambling and force structure.
2

Pattern 2 — Force citations and dates

Add: “Cite primary sources. Include publication year and journal/source name.”
3

Pattern 3 — Ask for ‘best evidence + guideline + review’ triad

Ask for: one guideline, one systematic review, and one key primary study (when available). This reduces cherry-picking.
4

Pattern 4 — Ask for uncertainty and limitations explicitly

Add: “List what is uncertain, controversial, or low-evidence.”
5

Pattern 5 — Ask for ‘what would change the answer’

Add: “What missing detail would materially change the conclusion?” This keeps you honest and prevents overconfidence.
6

Pattern 6 — Use negative constraints

Add: “Do NOT invent details. If unknown, say unknown.” (Surprisingly effective.)
7

Pattern 7 — Keep prompts non-identifiable by default

Avoid patient identifiers unless your governance explicitly allows it. Use abstracted descriptors if needed.
8

Pattern 8 — Ask for a verification checklist

Add: “Give a 5-step checklist to verify this answer in primary sources.”
9

Pattern 9 — Ask for a one-sentence ‘safe summary’

Add: “Give a single sentence that is safe to repeat to a colleague without overstating certainty.”
10

Pattern 10 — Stop when the question is answered

Timebox: 2 minutes to get citations; if not, switch tool or go direct to official sources.
SourceBrowse iatroX Knowledge Centre (indexed, structured answers)
Open Link

References

OpenEvidence: Security and compliance overview
OpenEvidence: Terms of use (content agreements / usage rules)
JAMA Network: OpenEvidence content agreement announcement
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  • Start with: “Return: 5 bullets, then a 3-row table, then the top citations.” Format constraints reduce rambling and force structure.

    Return to this section

  • Add: “Cite primary sources. Include publication year and journal/source name.”

    Return to this section

  • Ask for: one guideline, one systematic review, and one key primary study (when available). This reduces cherry-picking.

    Return to this section

  • Add: “List what is uncertain, controversial, or low-evidence.”

    Return to this section

  • Add: “What missing detail would materially change the conclusion?” This keeps you honest and prevents overconfidence.

    Return to this section

  • Add: “Do NOT invent details. If unknown, say unknown.” (Surprisingly effective.)

    Return to this section

  • Avoid patient identifiers unless your governance explicitly allows it. Use abstracted descriptors if needed.

    Return to this section

  • Add: “Give a 5-step checklist to verify this answer in primary sources.”

    Return to this section

  • Add: “Give a single sentence that is safe to repeat to a colleague without overstating certainty.”

    Return to this section

  • Timebox: 2 minutes to get citations; if not, switch tool or go direct to official sources.

    Return to this section

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