Finding the Right Clinical Trial

A practical guide to searching for trials, understanding eligibility, and connecting with research teams.

Step 1: Start with Your Diagnosis

The most important filter is your specific diagnosis. Use the exact medical terminology when searching — "Type 2 Diabetes Mellitus" rather than just "diabetes" will return more relevant results. Use PlainTrial's Conditions directory or the recruiting search to find trials for your condition.

Step 2: Understand Eligibility Criteria

Inclusion and Exclusion Factors

Every clinical trial has inclusion and exclusion criteria — factors that determine who can participate. Common factors include:

• Age range: Most trials specify an eligible age range
• Disease stage or severity: Some trials target specific stages
• Prior treatments: Some trials require you to have tried (or not tried) other treatments
• Other medical conditions: Some conditions may disqualify you
• Medications: Current medications may affect eligibility
• Geographic location: Trial sites are in specific cities/states

These criteria exist to ensure participant safety and produce reliable scientific results — not to be exclusive. If you don't qualify for one trial, you may qualify for others.

Step 3: Search by Location

Travel burden is a major factor in trial participation. Use PlainTrial's recruiting search and filter by your state to find trials with sites near you. Each trial's detail page lists study locations by state and city.

Step 4: Evaluate the Trial

Key Questions to Ask

Before contacting the research team, review the trial details:

• What is the study testing? (intervention type, dosage)
• How many visits are required, and what do they involve?
• What phase is the trial? (Phase 3 trials have more safety data than Phase 1)
• Is there a placebo group? What are the chances of receiving the actual treatment?
• What is the expected duration of participation?
• Is there compensation for time and travel?

Step 5: Talk to Your Doctor First

How Your Doctor Can Help

Before contacting any research team, discuss the trial with your healthcare provider. Your doctor can:

• Review the protocol and explain the medical details
• Help you assess whether you meet the eligibility criteria
• Identify potential risks given your medical history
• Coordinate with the research team if needed
• Manage your regular care during the trial

Step 6: Contact the Research Team

Preparing for the First Call

Each trial listing at ClinicalTrials.gov includes contact information for the research team. When you reach out:

• Have your diagnosis, current medications, and medical history summary ready
• Ask about a pre-screening call to assess your basic eligibility before committing to a full screening visit
• Ask about costs — what's covered by the trial vs. what you'd pay out-of-pocket

Understanding Placebo and Randomization

Many trials are randomized: a computer assigns you to a treatment group, and neither you nor often the study team chooses which one. Some studies include a placebo group that receives an inactive comparison, or a standard-of-care group that receives the current best treatment. This randomization is what lets researchers tell whether a new treatment truly works rather than just appearing to. It also means there is no guarantee you will receive the experimental treatment, and you may not learn which group you were in until the study ends.

For serious conditions, ethical rules usually prevent giving a true placebo when an effective treatment already exists — in those cases the comparison group receives standard care plus or minus the study drug. The trial's listing and the informed consent document spell out exactly what each group receives. If the design is unclear to you, that is a question to raise with the study team and your own doctor before agreeing to anything. Read our guide to trial phases to understand how much is already known about a treatment at each stage.

How to Spot a Legitimate Trial

Genuine clinical trials follow strict federal rules, and a few signs help you tell a real study from a scam or a marketing funnel dressed up as research:

• It is registered. Legitimate US trials appear on ClinicalTrials.gov with an NCT number, a named sponsor, and listed locations. If a "trial" has no registry entry, be cautious.
• It never asks you to pay to participate. You should not be charged a fee to join a trial. Some study-related care is provided at no cost; routine care may still be billed to insurance, which the team should explain up front.
• It has IRB oversight. Every legitimate trial is reviewed by an Institutional Review Board (IRB) that protects participants. The consent document names it.
• It does not promise a cure. Research tests whether something works — it cannot guarantee an outcome. Guaranteed results are a red flag.
• It welcomes your doctor's involvement. A trustworthy team is comfortable coordinating with your existing healthcare provider.

Resources for Trial Matching

• ClinicalTrials.gov — The official US registry, updated regularly
• NIH Clinical Research Trials & You
• Disease-specific advocacy organizations often maintain trial match services
• Major cancer centers (Mayo Clinic, MD Anderson, etc.) have dedicated clinical trial navigators