What Does It Mean To Join a Clinical Trial: Practical Guide for Cancer Patients
· Gena Health Team
We often hear from patients and families that clinical trials feel overwhelming, full of jargon and uncertainty. This is why we’re launching our Clinical Trials Demystified series. Over the coming weeks, we’ll explain in plain language everything you need to know about clinical trials, how to find them, and what to expect.
Want to us to cover a specific topic? Drop us a note at hello@gena.health, we’d love to hear from you.
When you or someone you love is facing cancer, the phrase “clinical trial” can feel intimidating. Many people think of trials as a last resort, but in reality, every cancer treatment available today once began in a trial. For some patients, trials can even offer access to new options earlier in the care pathway.
What are clinical trials?
Clinical trials are how doctors and researchers test new drugs, devices, or treatment approaches to see if they work, whether they are safe, and whether they can improve survival or quality of life.
A clinical trial is a type of research study involving people, designed to answer specific questions about a specific disease or condition and how a treatment would impact it. In cancer, trials often focus on:
New drugs or combinations of drugs; for example, a new chemotherapy agent or a targeted therapy
Different approaches to surgery or radiotherapy
Supportive care; studies on how to best manage fatigue, side effects, or emotional wellbeing
Every trial has clear eligibility rules, such as cancer type, treatment history, or age. They must also be approved by independent ethics committees before they begin, to ensure patient safety and informed consent.
Steps to join a clinical trial:
Joining a clinical trial usually involves several stages:
Learning about a trial: Most people hear about trials through their oncologist, hospital, advocacy organisations, or online databases like Cancer Research UK’s trial search or the NHS clinical trials hub. (Gena’s Compass platform is also in a pilot stage for glioblastoma (GBM) patients, offering personalised trial matches based on medical history.)
Talking to your doctor: If you find a trial that looks relevant, the next step is to discuss it with your oncologist or care team. They can help you understand whether the trial is suitable, explain potential benefits and risks, and make a referral if appropriate.
Pre-screening: Your medical records are checked against the trial’s eligibility criteria. Not every patient will qualify, but there are often multiple trials to consider.
Informed consent: You receive detailed written and verbal information about the purpose of the trial, what participation involves, potential benefits, and possible side effects.
Baseline tests: Scans, blood tests, and physical exams are carried out to establish your “starting point” before treatment begins.
Enrollment: Once eligibility is confirmed and you have given consent, you are officially enrolled and begin the study treatment.
What happens during and after participation?
Participation depends on the type of trial. You may:
Receive the new treatment being studied.
Be assigned to the current standard of care, for comparison.
Take part in a supportive care programme or monitoring schedule.
Randomisation
Some clinical trials are randomised, which means participants are placed into different groups by chance. One group receives the new treatment being tested, while another group receives the current standard treatment.
This can feel difficult, many people want certainty about which treatment they will get. But randomisation is done for a reason: it makes the results fair and reliable. By keeping the groups as similar as possible, researchers can truly understand whether the new treatment works better than what is already available.
What this means for patients:
You will always continue to receive cancer care — no one is ever left without treatment.
In cancer trials, placebos are rarely used on their own. If a placebo is part of the study, it is usually given with standard treatment, not instead of it
The trial team will explain exactly which treatments are possible in your study, and you can decide whether you are comfortable before joining.
At every stage, your participation is voluntary — you can leave a trial at any time and return to standard treatment.
During the trial, you will be monitored closely with hospital visits, blood tests, and scans, often receiving more attention from your care team than during standard treatment. Many patients find this extra support reassuring.
What happens after?
When a trial ends, several things can happen:
If the new treatment is safe and effective, you may continue with it in an “extension phase.”
You may return to standard treatment under your oncologist.
In many trials, the research team will follow you for months or years to monitor long-term effects.
Trial results are typically published in medical journals or shared at conferences. This can take time, but your participation contributes to knowledge that benefits future patients. Many people find meaning in knowing their involvement helps to advance cancer care.
Making a decision: What to consider?
Choosing whether to join a trial is a personal decision. Questions to ask your doctor or trial nurse include:
What is the goal of this trial?
How does it differ from standard treatment?
What are the possible risks and side effects?
How many extra hospital visits or tests will I need?
What happens if I leave the trial early, or if it doesn’t work for me?
It’s natural to balance hope with realism. For some, a trial offers access to new options and close monitoring. For others, the time, travel, or risks may not be right. Both choices are valid.
In summary…
Clinical trials aren’t a last resort - they are a potential pathway to explore beyond standard of care, with structured monitoring and safeguards. Participation is always voluntary, and having understanding and clear information can make the process less daunting.
Additional resources:
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This article is the first in our Clinical Trials Demystified series. Next, we’ll cover “How to Find Relevant Clinical Trials: 5 Steps to Get Started.”
Gena’s Compass is a free and secure AI-powered tool to match patients to treatments and clinical trials based on their treatment and medical history. We’re currently in our pilot phase and serving Glioblastoma patients, but we’re expanding quickly. If you or someone you know is living with GBM, see how Compass can help you navigate your cancer care.