Eligibility rules can feel strict because protocols are strict. Sites are audited. Data must be interpretable. Safety requirements are non negotiable.
If you are an edge case, the site cannot negotiate itself into risk.
How to avoid long calls that end in a predictable exclusion
The most efficient way to talk about eligibility early is to ask about categories that exclude most people. Coordinators can usually answer that without promising personal eligibility.
Common exclusion categories
- Medication classes that affect endpoints or safety.
- Recent participation and washout windows.
- Lab categories with protocol specific ranges.
- Scheduling constraints that make compliance unlikely.
Questions that save time
- What are the top three exclusion categories for this protocol?
- How far back do you review medications and supplements?
- If labs are borderline, are they repeated or final?
- What is the washout window for prior study participation?