Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 and up

Using genetic testing to prevent adverse drug reactions in primary care

Official title: A Multi-gene Pharmacogenetic Panel to Prevent Adverse Drug Reactions in Daily Primary Care Practice: Open-label, Mayo Clinic Multisite (Mayo Clinic Health System-Rochester Primary Care), Controlled, Implementation Study Taking the Results of the PREPARE Study Into Minnesota (PREPARE-Mayo)

Run by Mayo Clinic · NCT06322238 · Data updated 2026-11-12

This study tests whether genetic testing can help doctors choose the right medications and dosages for patients to prevent harmful side effects when they start new prescriptions.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment66 (estimated)
SponsorMayo Clinic
Academic / other
Locations1 site (Rochester, Minnesota)
StatusRecruiting
StartedDecember 1, 2024
Main results expectedDecember 2026
Study endsApril 2027
Registry record updatedOctober 19, 2026
Trial IDNCT06322238 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older who are receiving their first prescription for one of the targeted medications in a primary care setting.

Probably not a fit

Patients who have previously undergone pharmacogenomic testing for the relevant genes or those who are pregnant or lactating may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study aims to implement pre-emptive pharmacogenomic testing to guide the selection and dosing of 39 commonly prescribed medications. By analyzing a panel of clinically relevant pharmacogenomic markers, the study seeks to reduce the occurrence of adverse drug reactions (ADRs) associated with specific medications. Participants will be followed for 48 weeks to assess the effectiveness of this approach in a primary care setting. The study focuses on patients receiving their first prescription for these drugs and involves saliva donation for genetic analysis.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the risk of adverse drug reactions in patients, leading to safer and more effective medication management.

How similar studies have gone: Other studies have shown promise in using pharmacogenomic testing to improve drug safety and efficacy, indicating that this approach is both relevant and potentially impactful.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Inclusion Criteria:

In order to be eligible to participate in this study, a subject must meet all of the following criteria:

1. Subject must be ≥ 18 years old
2. Subject must receive a 1st prescription (meaning no known prescription for this drug in the preceding 12 months) for a drug included in Table 1, which is prescribed to them in routine primary care.
3. Subject is able and willing to take part and willing to be followed up on for 48 weeks
4. Subject is able to donate saliva
5. Subject has signed informed consent
6. Subject meets requirement for computer access implying computer literacy as measured by active use of the patient portal or their email

Exclusion Criteria:

1. For the investigational arm only: Previous (direct-to-consumer, or clinical) pharmacogenomic testing that includes any of the genes included in the Focused Pharmacogenomics Panel
2. Pregnant or lactating (to be verbally confirmed with the patient)
3. Life expectancy estimated to be less than three months as determined by patient receiving hospice care
4. Duration of index drug total treatment length is planned to be less than seven consecutive days.
5. Current inpatients
6. Unable to consent to the study
7. Unwilling to take part
8. Subject has no permanent address
9. Subject has no current primary care provider
10. Subject is, in the opinion of the study coordinator after discussion with participating clinician/pharmacist/investigator, not suitable to participate in the study
11. Patient has a diagnosis of stage 4 or 5 chronic kidney disease (CKD) or is receiving dialysis
12. Patients with advanced liver failure (stage Child-Pugh C) or a diagnosis of liver cirrhosis
13. History of a liver transplant or an allogeneic hematopoietic stem cell transplant
14. DNA sample collected that requires retesting in the event that DNA collected was not sufficient for testing as determined by the laboratory

Where it's running

  • Mayo Clinic
    Rochester, Minnesota, United States
    Recruiting

Study contacts

  • Principal investigator: Isa Houwink, M.D., Ph.D. — Mayo Clinic

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.