In this article you will learn:
- What treatment-related benefits can a clinical trial realistically offer?
- What extra medical care and monitoring do trial participants receive?
- How are patient care costs and research costs covered?
- Will your health insurance pay for trial-related costs?
- What questions should you ask before agreeing to take part?
- What are the trade-offs alongside the benefits?
- When should you talk to your doctor about a trial?
What treatment benefits can a clinical trial offer?
Taking part in a treatment trial may give you access to a treatment that is only available as part of that trial and not available to people outside it[1]. If the treatment being studied works better than the standard treatment, you may be among the first patients to benefit from it[2]. No one knows in advance whether the new treatment will work better than the standard one – that is the reason the trial is being run[3].
The treatment tested is not limited to a new drug. A trial can compare new combinations of existing drugs, new ways of giving a treatment, surgery, radiotherapy, or a different schedule of an existing drug (for example, weekly versus monthly dosing). Some trials also test supportive care, such as new drugs or approaches for controlling pain, nausea, or shortness of breath[4].
There is no guarantee attached to any of this. The experimental treatment may turn out to be no better than the standard treatment, or worse, and it may cause side effects that are worse than those of standard treatment[1].
How does the trial phase affect what you receive?
What you are given, and how much is already known about it, depends on the phase of the trial[2]. By the time a treatment reaches phase 3, doctors already know more about it from phase 1 and phase 2, so the risk of an unexpected harmful side effect is lower than in earlier phases[3].
| Phase | Who typically takes part | What is being learned | What this means for you |
|---|---|---|---|
| Phase 1 | Small number of people, sometimes healthy volunteers | Side effects and the right dose, starting with small doses | Least is known about the treatment; doses increase only if side effects are absent or minor[2] |
| Phase 2 | Larger group of people who are ill | Short-term effects of the treatment | Better idea of whether the treatment works, still limited safety data[2] |
| Phase 3 | Several thousand patients, often over a year or more | Comparison against existing treatment or placebo | More is known about the treatment; lower risk of unexpected harmful side effects[3] |
| Phase 4 | Patients using the treatment after it has a marketing licence | Safety, side effects and effectiveness in ongoing use | Treatment is already available on prescription; not every treatment goes through this phase[2] |
What extra care and monitoring do participants get?
If you take part, you are usually randomly assigned either to the treatment group or to a control group that receives an existing standard treatment, or a placebo if no proven standard treatment exists[2]. Whichever group you are in, you are monitored and cared for by both the research team and the medical staff already involved in your overall care[5].
You may have more blood tests, scans, or other tests than with standard care. You may also have check-ups more often and for a longer period than usual[3]. During these extra visits, your doctor watches carefully for side effects and for your safety in the study[6].
Some trials use quality-of-life questionnaires. You may be asked to complete these at set points during the trial, on paper or electronically[4]. Many patients find the extra tests and appointments reassuring. Some find they trigger more worry about their condition. Only you know how you feel about this, and the research team should explain every test and appointment before you decide[3].
How are costs split in a clinical trial?
Costs in a clinical trial fall into two categories: patient care costs and research costs. Patient care costs are the costs you would pay even if you were not in the trial, and these are often covered by health insurance. Research costs are the costs related specifically to taking part in the trial, and these are often not covered by health insurance but may be covered by the trial's sponsor[6].
| Cost type | Examples | Who typically pays |
|---|---|---|
| Patient care costs | Doctor visits, hospital stays, standard cancer treatments, treatments for symptoms or side effects, lab tests, x-rays and other imaging tests[6] | Often health insurance |
| Research costs | The study drug, lab tests done purely for research purposes, extra x-rays or imaging done solely for the trial, extra doctor visits you would not have with usual care[6] | Often the trial's sponsor |
| Travel-related costs | Travel, lodging, meals, parking, child and elder care[6] | Sometimes the trial, sometimes the patient; ask the research team[6] |
Before you join a study, ask the study coordinator which costs are covered and which are not[6]. Some trials offer payment to participants, and the amount can vary depending on what the trial expects from you. Other trials offer no payment and only cover your travel expenses[2].
Will your health insurance cover trial costs?
Learn as much as you can about which costs you or your health plan need to pay, and which costs will be covered by the study, before you join. Talk with your doctor, the research team, and your health plan directly[6].
Ask your doctor whether a staff member, such as a financial counsellor or research coordinator, can help you work with your health plan. If no such person is available, call the customer service number on the back of your insurance card[6].
Questions worth asking your health plan directly:
- Does the plan cover routine patient care costs for people taking part in clinical trials?[6]
- Is a pre-authorisation required before the plan will review the trial and decide on coverage?[6]
- What information does the plan need for a pre-authorisation – medical records, a doctor's letter, a copy of the informed consent form?[6]
- If a pre-authorisation is not required, can you get a letter from the plan confirming this in writing?[6]
If your health plan asks for supporting evidence, items that may help include medical journal articles showing possible patient benefits from the treatment, a letter from your doctor explaining why the trial is a reasonable option for you, and support letters from patient advocacy groups. Ask your doctor or the trial's contact person for a target date for when treatment should start, so coverage decisions are made in time[6].
If your claim is denied, contact your insurance plan's billing office for help. The billing manager may be able to explain how to appeal the decision[6].
What are the trade-offs alongside the benefits?
Extra appointments can cost you time and money, for example through extra bus fares or parking[3]. Some trials require overnight stays, and there may be restrictions on daily activities, such as being asked not to eat or not to drink alcohol for a period of time[2].
You may experience unknown side effects from the treatment[2]. Most clinical trials carry a risk of minor discomfort that usually lasts only a short time, though in rare cases participants have experienced serious complications from an experimental treatment[7]. A trial may also involve more paperwork than standard care[3].
Weigh the possible benefits against these inconveniences and risks before you sign the informed consent document. The document describes in detail the specific risks associated with the study[7].
What questions should you ask before joining a trial?
Ask your doctor and the research team specific questions about the trial before agreeing to take part. Useful questions cover four areas: the trial itself, risks and benefits, your rights, and costs[1].
- What is the purpose of the trial, and why do researchers believe the new treatment may work better than the current one?[1]
- What are the possible short-term and long-term benefits, and how do they compare with standard treatment?[7]
- Which costs do you have to pay, and which costs will your health insurance cover?[1]
- Does the study involve a placebo, and will your doctor know which group you are assigned to?[5]
- If the treatment works for you, can you keep using it after the study ends, and will you receive follow-up care?[5]
- How will your health information be kept private, and what happens if you decide to leave the trial?[1]
Taking part in a clinical trial is always voluntary, and you are free to leave a study at any time[5]. The choice to participate should be made without pressure from anyone, and it may help to discuss the trial with someone not directly involved in your care[4].
When should you talk to your doctor about a trial?
Speak with your doctor or a patient organisation if you want to know whether a relevant clinical trial exists for your condition[2]. Talk to your doctor before signing the consent form if you are unsure how the trial's costs, risks, or care schedule will fit your situation[5].
Contact the research team at any point during the trial if you experience side effects, have questions about your care, or are considering leaving the study[5]. Ask who will be in charge of your care during the trial, and who you can speak with about questions during and after it ends[1].
Summary
A clinical trial can give you access to a treatment not otherwise available, extra medical attention from a research team, and – in some cases – payment or covered travel expenses. None of this is certain: the new treatment may not work better than standard care, and it may carry side effects that are not yet fully known.
Costs split into patient care costs, usually covered by insurance, and research costs, usually covered by the sponsor. Confirm coverage with your health plan and the research team in writing before you start, and ask every question you have before signing the consent form. You can leave the trial at any time.
❓ Will I definitely get the new treatment if I join a trial?
Not necessarily. Participants are usually randomly assigned either to the treatment group or to a control group receiving the standard treatment or a placebo if no proven standard treatment exists. This is called randomisation, and it helps reduce bias in the results.
❓ Who pays for the study drug itself?
The study drug is a research cost. Research costs are often not covered by health insurance, but they may be covered by the trial's sponsor. Ask the study coordinator directly which specific items are sponsor-funded before you join.
❓ Does my health insurance cover routine care I'd need anyway during a trial?
Often yes, since these are patient care costs – the same costs you would pay even outside the trial, such as doctor visits, hospital stays and standard tests. Confirm with your health plan whether a pre-authorisation is required before coverage is approved.
❓ Will I get more medical attention than with standard treatment?
Often yes. Trial participants are monitored by both the research team and the medical staff already involved in their care, and may have more blood tests, scans and check-ups than usual. Some people find this reassuring; others find it makes them more nervous.
❓ Can I leave a clinical trial once I've joined?
Yes. Taking part in a clinical trial is always voluntary, and participants are free to leave a study at any time. Ask in advance what happens to your medical care if you decide to stop participating.
❓ What should I do if my insurance denies a claim related to the trial?
Contact your insurance plan's billing office for help. The billing manager may know how to appeal the health plan's decision, and you can also review your policy directly to understand your appeal options.
❓ Are travel and accommodation costs ever covered?
Sometimes. Some trials help cover travel, lodging, meals, parking, or child and elder care costs; others do not. Ask the research team directly whether the study offers this kind of financial help.
- [1] Who Pays for Clinical Trials? (accessed 2 June 2026) – https://www.cancer.gov/research/participate/clinical-trials/why-participate
- [2] Clinical trials - NHS (accessed 2 June 2026) – https://www.nhs.uk/tests-and-treatments/clinical-trials/
- [3] The pros and cons of taking part in a clinical trial - Cancer Research UK (accessed 2 June 2026) – https://www.cancerresearchuk.org/about-cancer/find-a-clinical-trial/what-you-should-be-told-about-a-clinical-trial/advantages-and-drawbacks
- [4] Clinical trials. Your questions answered - The Royal Marsden (accessed 2 June 2026) – https://patientinfolibrary.royalmarsden.nhs.uk/document/download/1350
- [5] Clinical Research: Why Take Part? - Johns Hopkins Medicine (accessed 2 June 2026) – https://www.hopkinsmedicine.org/research/understanding-clinical-trials/why-take-part
- [6] Who Pays for Clinical Trials? (accessed 2 June 2026) – https://www.cancer.gov/research/participate/clinical-trials/paying
- [7] Benefits, Risks, and Safety Measures - NHLBI, NIH (accessed 2 June 2026) – https://www.nhlbi.nih.gov/research/clinical-trials/safety-benefits-risks
