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RecruitingLast updated: 23 October 2025

RATIONAL-PT (Core): A core trial for several sub-studies that are exploring the role of different medications to prevent infections in people with blood cancersA Randomised Platform Trial Evaluating the Role of Interventions to Prevent Infection in Patients With Acquired Hypogammaglobulinemia Secondary to Haematological Malignancies

Trial purpose

Medical clipboardSide effect and wellbeing

Tumor type

Blood Cancers Haematological

Age

People18+

Trial acronym

RATIONAL-PT (Core)

Clinical summary

Summary

This research project uses an Adaptive Platform Design. This design allows researchers to compare multiple infection prevention strategies within the same trial at the same time (rather than running separate trials), to analyse results as the trial occurs and to add new research questions during the course of the trial. 

The treatments that you may receive as part of the study will be determined by which domain(s) of the platform you participate in. Depending on the domain you are participating in, you may be assigned to a study treatment by chance (randomly). Following randomisation (if applicable), you will be asked to complete your Day 1 assessments.

To learn more about the domains of the RATIONAL-PT study, you can search for the following individual trial records:

  • Start-Ig: NCT07202078, ACTRN12624000964516
  • Stop-Ig: NCT07202091, ACTRN12624000963527
  • Dose-Ig: NCT07202065, ACTRN12624000962538

If eligible to participate in a domain of the RATIONAL-PT, you ractive study participation in that domain will last for 13 months and all participants will return to the hospital for a study visit every 3 months (4-more in-person visits after Day 1). During each month of the 12-month treatment period except the months in which you are attending in-person study visits, you will receive a phone call from your treating clinical team to check your progress (8 calls in total).

Even if you are recommended to, or choose to, stop your domain treatment during the 12-month treatment period, you will be asked to continue attending study visits and having phone calls until the end of the trial period (13 months in total) because researchers are still interested in your outcomes.

At the end of your participation in the study, your doctor will decide if you still require treatment to prevent infection, and if you do, whether to continue on the treatment you received during the study (immunoglobulins, antibiotics, or none).

The results of this trial will inform clinical decision making about the use of immunoglobulin and oral antibiotics for patients with blood cancers. Your participation may help doctors who treat patients with blood diseases in the future to know whcih treatment to prescribe to try to prevent serious infections.

Conditions

This trial is treating people with any haematological malignancy, including chronic lymphocytic leukaemia, multiple myeloma or non-Hodgkin's lymphoma

Eligibility

Inclusion

1. Aged greater than or equal to 18 years of age
2. Diagnosis of haematological malignancy, including CLL, MM or NHL
3. Eligible to receive or currently receiving Ig (IV or subcutaneous - SCIg) replacement for history of recurrent or severe infection(s) and IgG less than the lower limit of the reference range (excluding paraprotein) OR IgG<4g/L (excluding paraprotein)
4. Life expectancy > 12 months
5. Able to give informed consent

Additional eligibility criteria will apply for each domain of the RATIONAL Platform Trial.

Exclusion

1. Treating team deems enrolment in the study is not in the best interests of the patient

Additional eligibility criteria will apply for each domain of the RATIONAL Platform Trial.

Inclusion

  • You have the type of cancer, symptoms, or health risks that this clinical trial is focused on.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

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More information

Trial Identifiers

Information on this page is partially produced from ANZCTR, ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

Trial sponsor

Monash University

Scientific Title

A Randomised Platform Trial Evaluating the Role of Interventions to Prevent Infection in Patients With Acquired Hypogammaglobulinemia Secondary to Haematological Malignancies

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