Ozone, hyperthermia and “immune” therapies sold to cancer patients — what the evidence actually shows

The claim is nearly always a version of one sentence: this will activate your immune system, so your body can fight the cancer itself. Ozone is described as oxygenating the blood. Heat is described as waking up immune cells. Drips are described as building immunity. The word immunotherapy has been borrowed. The evidence behind it has not come along.

These are the four offers families across Telangana and Andhra Pradesh actually bring to us, usually written on a package price rather than a prescription.

This page names practices, not clinics and not people. If a centre has offered you one of these, the useful next step is to bring the brochure to your oncology team.

Guideline positions are summarised from NCCN, ASCO and ESMO patient-facing guidance; approval status refers to CDSCO, India's drug regulator, as of August 2026. Where a therapy is genuinely still being studied, this table says so rather than picking a side.

1. 1

   Time you cannot get back

   A ten-session package takes weeks. If prescribed treatment is paused to fit it in, the cancer is not pausing with it. This is the harm we see most often, and the hardest to undo.

2. 2

   Direct physical risk

   Ozone is a reactive gas, and putting it into blood or tissue can cause harm, including infection from the injection. Repeated drips mean repeated lines, and a line is a route for infection — which matters more when treatment has lowered your counts.

3. 3

   A confused clinical picture

   If loose motion, breathlessness or a rash is put down to detox rather than reported, a genuine side effect can go unrecognised for days. Some infusions also shift routine blood results, so your team is reading a picture that is not really yours.

4. 4

   Money, and the hope attached to it

   These packages are paid in advance and rarely refunded. Families spend on them exactly when money is needed for scans, drugs and travel — and the cost of hope placed where it was not warranted lands later, on the same family.

Checkpoint inhibitors — the PD-1 and PD-L1 group — are given as monitored infusions in a day-care unit, for the cancers where testing suggests they may help, and only for a proportion of patients. BCG instilled into the bladder for early bladder cancer is a genuine immune treatment, and one of the oldest: a regulated product, given at a hospital, on a defined schedule, for one defined situation.

The cytokine treatments came before all of this. Interferon and interleukin, the older immunotherapies, are still used, far more selectively than before, and they are the reason the phrase “boosting immunity” entered cancer conversation in the first place — with side effects that were anything but gentle.

Bispecific antibodies are the newer group, used mainly in blood cancers: see how bispecific antibodies are used in blood cancers, and why they begin with step-up dosing and a planned hospital admission rather than a walk-in appointment. That level of supervision is a fair benchmark for anything calling itself an immune treatment.

Cell therapies such as CAR-T are given only at a small number of specialist centres. CION does not provide CAR-T or cell therapy; we explain it, and refer patients who need that assessment. Any package offered locally as a cell “vaccine” is not this.

Three questions to ask before you pay

• Is it approved by CDSCO to treat cancer, and for which cancer? A wellness registration or an import licence is not a cancer approval. Ask to see it in writing.
• Who monitors me on it, and what do they check? A genuine immune treatment comes with blood tests, a review schedule, and a named doctor responsible for side effects.
• What happens to my prescribed treatment while I do this? If the answer involves stopping or postponing it, stop and speak to your oncology team first.

• Interferon and Interleukin: The Older Immunotherapies — the real treatments that the phrase “boosting immunity” was borrowed from, and how they are used today.
• Bispecific Antibodies for Blood Cancers — a newer group of genuine immune treatments, and what they are and are not used for.
• Step-Up Dosing and Hospital Admission for Bispecific Therapy — the level of monitoring a real immune treatment involves, a useful yardstick for any offer you receive.
• Immunotherapy at CION Cancer Clinics — how CION assesses, explains and monitors immunotherapy, and who it is genuinely suitable for.

This page is for general information and does not replace a consultation. Tell your oncology team about any therapy, drip, supplement or package you are taking or considering, including anything described to you as immunotherapy, before you start or stop it.

Families ask us about these therapies every week

Wanting to do something more during a frightening wait is not foolish. Ask us before you pay, and we will go through the offer with you honestly, in plain language, at no cost.