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Understanding clinical trials

Chemotherapy in a — Clinical Trial

A clinical trial is not a last resort and not a gamble. For some patients, it is the fastest route to a treatment their oncologist believes is worth trying — and the costs are usually covered by the organisation running the trial.

Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed September 2026

  • Not experimental in a harmful sense — Every trial in India must be approved by CDSCO and a hospital ethics committee before any patient joins.
  • Access to newer treatments — Trials can give you access to a regimen that is not yet widely available outside the study.
  • Costs usually covered — The organisation funding the trial pays for the study treatment in most cases. Ask what you will still need to pay.
  • You can leave at any time — Joining is voluntary. Leaving does not affect your right to standard treatment at your centre.
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Joining a clinical trial gives you access to a chemotherapy regimen that your oncologist believes is likely to help you. Trials in India are regulated by CDSCO and require your written consent. Treatment costs are usually covered by the sponsor. Joining is voluntary, and you can leave at any time.

What do the terms on your consent form mean?

Clinical trial
A research study testing a treatment in people under controlled conditions. Every trial in India must be registered on the Clinical Trials Registry — India (CTRI) before a single participant joins.
Phase
The stage of the research. Phase I tests safety in a small group. Phase II looks at whether the treatment works. Phase III compares it directly against the current standard treatment. Most patients are offered Phase II or III trials.
Randomisation
A computer, not your doctor, decides which treatment group you join. This makes the comparison between treatments fair. It is not a judgment about your case or your prognosis.
Informed consent
A document you sign before joining. It sets out what is known and not yet known, what you will receive, and your right to leave at any time without losing access to standard care.
Sponsor
The organisation — usually a pharmaceutical company or a research institution — that funds and runs the trial. The sponsor pays for the study treatment in most trials.
Protocol
The fixed plan every hospital site must follow: who is eligible, what treatment is given, at what frequency, and how you are assessed. Your oncologist cannot adjust it for individual patients.
Standard of care arm
In a Phase III trial, one group receives the treatment currently recommended for your cancer. Being assigned here is not a disadvantage — it is the same treatment you would receive outside the trial, with the same monitoring.
Placebo
A treatment with no active medicine. In cancer trials, a placebo alone is almost never given. Where one appears, it is added alongside standard treatment to test whether the new medicine provides extra benefit on top of what you already receive.

How does a clinical trial differ from standard treatment?

FeatureClinical trialStandard treatment
What you receiveA new treatment or combination, tested alongside or instead of standard careThe regimen your oncologist recommends based on current guidelines
Who pays for study treatmentThe trial sponsor, in most casesYou, your insurer, or a government health scheme
MonitoringOften more frequent — additional tests as set by the protocolAs clinically needed
EligibilityYou must meet the trial's specific inclusion criteriaBased on your oncologist's clinical judgment
Can you stop?Yes, at any time, without affecting your right to standard careYes
WhereAt a CDSCO-approved site — may be only at specific centresAt any accredited cancer centre

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What to ask your oncologist before deciding

  • What phase is this trial, and what does that mean for me?
  • Which treatment arms exist, and what does each arm involve?
  • Could I be assigned to the standard treatment arm rather than the new treatment?
  • Who pays for the study treatment, and what will I still pay out of pocket?
  • How many extra visits or tests does the trial require compared to standard care?
  • What happens to my care if the trial closes early or I want to leave?
  • Can I take the informed consent document home and read it before I sign?

Questions families usually ask before they decide

Is joining a trial riskier than having standard treatment?

Every trial in India goes through two layers of review before a single patient joins: the CDSCO, the national drug regulator, and an independent ethics committee at each hospital site. Phase III trials — what most patients are offered — have already shown in earlier phases that the treatment is safe enough to test against standard care. The question is not whether the trial is risky in absolute terms, but whether the remaining unknowns are ones you are comfortable with. Your oncologist can explain exactly what is and is not yet established about the treatment being studied.

Why is my oncologist suggesting a trial rather than just treating me?

There are usually two reasons. The first is that the trial treatment is genuinely believed to offer a meaningful advantage over current standard care, and a trial is how it becomes available before it receives full approval. The second is that your cancer type or stage is one where current standard options are limited, and a trial offers a legitimate additional route. Neither reason means your oncologist has run out of options or given up on you. Ask directly which reason applies to your situation, and ask what the alternative is if you choose not to join.

What if the computer assigns me to the group that does not get the new treatment?

In a well-designed Phase III trial, both arms are considered reasonable choices at the time the trial is designed — that is the scientific basis for running it. The standard care arm gives you the treatment that NCCN, ASCO or ESMO already recommends for your cancer. You are not at a disadvantage compared with being treated outside the trial, and you are monitored at least as closely. If one arm turns out to be clearly better, the independent data monitoring committee is required to stop the trial and offer the better treatment to everyone in the study.

What if I want to leave after I have joined?

You can leave at any time and for any reason. You do not need to give a reason, and leaving does not affect your right to receive standard cancer treatment. Your oncologist will discuss next steps. The consent form you signed may say that data collected while you were in the trial can still be used in the study analysis — ask about this before you join if it concerns you. Leaving the trial is not the same as leaving your treatment team.

Did you know?

Every clinical trial in India must be registered on the Clinical Trials Registry — India (CTRI) before enrolment begins. The registry is publicly searchable and lists the treatment arms, eligibility criteria, and which hospitals are approved sites.

If your oncologist mentions a trial, you can look it up at ctri.nic.in before your next appointment and go in with specific questions.

Source: Central Drugs Standard Control Organisation (CDSCO) — CTRI registration requirements

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Common questions

Frequently asked questions

Is joining a clinical trial the same as being a guinea pig?

No. Every trial in India is approved by CDSCO and reviewed by an independent ethics committee at every hospital running it. You receive a written explanation of what is known and not yet known before you sign anything, you can ask questions, and you can leave at any time. You are a participant with defined rights, not a subject without a say. The concern is understandable, but the comparison does not apply to a regulated Phase II or III trial.

Will I know which treatment I am receiving?

It depends on how the trial is designed. Many cancer trials are open-label, meaning both you and your oncologist know which group you are in. Some are blinded. Ask your oncologist specifically how this trial works before you decide. If the trial is blinded and you develop a serious side effect, the blind can be broken so your care team can act on complete information.

Do I have to pay anything to join?

The study treatment is usually paid for by the trial sponsor. What you may still pay for varies — routine investigations, hospital charges for conditions unrelated to the trial, and travel are common examples. Ask for a written breakdown of what the sponsor covers before you sign consent. Do not assume everything is free, but do not assume the opposite either. Get the specifics in writing from the trial coordinator at your centre.

What happens if the trial closes before I finish my treatment?

Trials can close early because one arm was clearly better or worse, because enrolment was too slow, or because of a safety signal. If yours closes, your oncologist will discuss your options for continuing treatment outside the study. In some cases the sponsor makes arrangements for participants to keep receiving the study treatment for a defined period. Ask about this plan before you join, not after.

How do I find out if a trial is open for my cancer type?

Ask your oncologist first — they know which trials are running at their centre and whether your diagnosis and stage meet the eligibility criteria. You can also search ctri.nic.in, which lists all registered trials by condition and site. Not every listed trial will be open to new participants, so use the registry to have an informed conversation with your team rather than to choose your own treatment.

Can I keep taking Ayurvedic or other traditional medicines while I am in a trial?

Tell your trial team before you join, not after. Some traditional medicines and supplements can interact with chemotherapy, and the trial protocol may restrict other treatments you take alongside the study treatment. Your team will not judge the practice, but they need the information to keep you safe and to keep the trial data reliable. Tell your oncologist everything you are taking — herbs, supplements, Ayurvedic preparations — and let them advise you on what is safe to continue.

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