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What Actually Happens During a Clinical Trial Visit? A Step-by-Step Patient Guide
Most patients have never been to a research visit. Here is exactly what to expect — from the parking lot to the
follow-up call.
One of the biggest barriers to clinical trial participation is simply not knowing what to expect. Patients imagine something clinical and impersonal — a maze of equipment, unfamiliar faces, and unclear instructions. The reality at a community-based research site like Mission Research Institute is quite different.
Here is a realistic, step-by-step picture of what a clinical research visit actually looks like — from your first phone call through study completion.
Step 1: The Phone Pre-Screen (15–20 Minutes)
It starts with a conversation, not a form. A research coordinator calls you — or you call us — and asks a series of brief questions about your health history, current medications, diagnoses, and general lifestyle. This is not a medical evaluation. It is simply a first filter to determine whether a particular study might be a good fit based on its eligibility criteria.
If you pass the pre-screen, the next step is scheduled: a free on-site screening visit.
Step 2: The Screening Visit (2–3 Hours)
This is your first in-person visit. You will arrive at the research site, check in, and meet your research coordinator — the person who will be your primary point of contact throughout the study. Here is what typically happens:
- A review of your medical history and current medication list
- Vital signs: blood pressure, heart rate, weight, height
- Physical examination performed by a study physician
- Blood draw for laboratory evaluation (metabolic panel, lipids, HbA1c, and study-specific markers)
- An EKG in some studies
- A review and signature of the Informed Consent Form — with as much time as you need to ask questions
Step 3: Waiting for Results and the Eligibility Decision
After your screening visit, your lab results are reviewed — typically within one to two weeks. The study team determines whether you meet the protocol’s eligibility criteria. If you qualify, you are contacted to schedule your first treatment visit. If you do not qualify for one study, you may be a candidate for another.
Step 4: The Baseline and First Treatment Visit
This visit establishes your starting point — your baseline measurements — before any investigational treatment begins. Additional labs are drawn, questionnaires are completed, and you receive your first dose of the study medication (or placebo, depending on the design). Your coordinator walks you through exactly what to expect before your next visit.
Step 5: Follow-Up Visits — The Rhythm of the Study
Follow-up visits are where most of the study takes place. Depending on the protocol, you may come in weekly at first, then monthly, then every few months. Each visit involves some combination of labs, vitals, a physician check-in, questionnaires, and medication refills. You are compensated at each visit for your time and travel.
Step 6: Study Completion and End-of-Study Visit
When the study concludes — or your participation period ends — a final comprehensive evaluation is performed. Labs are drawn, your physician does a final assessment, and the study team discusses next steps for your ongoing care. In many cases, if the treatment was beneficial, your personal physician can help you transition to similar approved treatments.
What to Bring to Your First Research Visit
A few practical tips from our research coordinators:
- A complete list of all medications, supplements, and vitamins with dosages
- Your insurance card — though study-related care will not be billed to insurance
- Reading glasses if you need them for reviewing documents
- A trusted family member or friend if you would like support
- Questions written down — there are no wrong ones
A clinical trial visit is, at its core, a medical appointment with more attentive follow-through than most patients receive in standard care. You are seen, monitored, and heard — at no cost to you.
What to Expect During a Clinical Trial Visit
What happens at your first clinical trial screening visit?
The first in-person screening visit typically lasts two to three hours and includes a review of your medical history
and medications, vital signs, a physical exam by a study physician, blood draw for lab work, and in some cases an
EKG. You will also review and sign an Informed Consent Form at your own pace, with time to ask questions.
Results are reviewed within one to two weeks, after which the study team determines whether you qualify.
How often do you have to come in during a clinical trial?
Visit frequency depends on the study protocol but typically starts more frequent and tapers over time — often
weekly at first, then monthly, then every few months. Each visit includes some combination of lab work, vital
signs, a physician check-in, questionnaires, and medication refills.
What should you bring to your first clinical trial visit?
Bring a complete list of all medications, supplements, and vitamins with dosages; your insurance card (though
study-related care is never billed to insurance); reading glasses if needed for reviewing documents; and any
questions you have written down. You are also welcome to bring a family member or friend for support. The
visit is, at its core, a medical appointment — with more attentive follow-through than most routine care.
