Walking into a research clinic for the first time feels a lot like a regular doctor's visit — with one big difference: nothing is committed. A screening visit is a *look-see* on both sides. The study team is checking whether the trial is a good fit for you. And you're checking whether the trial is a good fit for you.
Here is what actually happens.
Before you arrive
You will usually get a call from a study coordinator a few days ahead of time. They'll confirm the visit, tell you roughly how long it will take (plan for 1–3 hours for a screening), and give you a short list of things to bring:
- A photo ID
- A list of your current medications, doses, and how often you take them
- Names of the doctors who treat any chronic conditions
- Insurance card (some studies verify eligibility this way; the trial itself is free)
Some studies ask you to fast for 8–12 hours before the visit if blood work is planned. Read the appointment reminder carefully.
Check-in and consent
The first real step is the informed consent form. This is not fine print. It is a plain-language document — often 15 to 25 pages — that walks through what the study is testing, what the risks and side effects have been in earlier participants, what your visits will look like, and what you'll be paid.
You are allowed to:
- Read it at your own pace
- Ask any question, even one you think is dumb
- Take it home before signing
- Say no and leave, at any point, forever
Signing the consent form does not lock you in. You can withdraw from any clinical trial at any time, for any reason, and the study team is legally required to respect that.
Health screening
Once you've consented, the medical part begins. A screening usually includes:
- Vital signs (blood pressure, heart rate, temperature, weight)
- A basic physical exam
- Blood draw and a urine sample
- A pregnancy test for people who could become pregnant
- Sometimes an EKG or a specialty scan, depending on the condition being studied
The team is checking your "eligibility criteria" — the specific health markers the study requires. You might qualify, you might not. Neither outcome is a judgment on your health; it's about matching you to a study designed for people at a specific point in their condition.
Talking about your history
Expect detailed questions about your medical history, medications (including over-the-counter and supplements), and lifestyle. The team is looking for anything that could interact with the study drug or muddy the results. Be candid — everything you share is protected by HIPAA and the study's confidentiality rules.
Learning about payment and travel
Before you leave, you'll get a written schedule of visits and payments. Compensation is typically paid per visit, either by check, direct deposit, or a reloadable debit card. If the study requires overnight stays or long-distance travel, mileage and lodging reimbursement are usually included and disclosed up front.
What happens next
You won't always find out on the same day whether you qualify. Blood work needs to be processed. The team may need to review your file with the study doctor. Expect a call within a few business days.
If you qualify and you want to enroll, you'll schedule your first study visit. If you don't qualify, ask the coordinator to keep your information on file — a study you weren't right for today may have a sister study starting next quarter that's a better match.
Your rights, always
Two things are true at every clinical trial visit, from screening to your last follow-up:
1. You can stop at any time. Withdrawal has no consequence to your regular medical care. 2. You will be told about anything the study learns that could affect your decision to stay in. This includes new side effects discovered in other participants.
This isn't medical advice — every study is different, and your doctor and the study team are your best resource for questions about your specific situation. But knowing what a first visit looks like can turn a nervous unknown into a much smaller decision.
Ready to see what studies are enrolling near you? Start with our [find-a-trial search](/#find-trials) and filter by your zip code and condition.