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Drug InteractionKF2022#4NCT06566794

KF2022#4-trial: Effects of a Beta Blocker and NSAID on CYP Mediated Drug Metabolism

A study testing Caffeine Tablet, Bupropion Hydrochloride Capsels and Repaglinide Capsels in people with Drug Interaction, run by Helsinki University Central Hospital at 1 site in Finland.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Carvedilol is a non-selective beta-blocker in common clinical use, used to treat hypertension, heart failure, and angina pectoris symptoms associated with coronary artery disease. Read more about this study

Who is it for?
Ages 18 to 40 yearsHealthy volunteers can take part
Conditions the study is for
Drug Interaction
What is being tested?
Caffeine Tablet, Bupropion Hydrochloride Capsels and Repaglinide Capsels
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
12 participants
Where
1 siteFinland
Study dates
22 Aug 2024to 10 Jan 2025
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 40 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Written informed consent
  • Age 18-40
  • Healthy
  • Systolic blood pressure ≥110 mmHg
  • Heart rate ≥ 55/min
  • Normal ECG
  • Accepted results from laboratory tests (blood haemoglobin, basic blood count and blood platelets, alanine aminotransferase, alkaline phosphatase, glutamyl transferase, creatine kinase, creatinine, plasma glucose concentration, plasma potassium and sodium). Negative pregnancy test result (serum human chorionic gonadotropin) for women.

Who cannot join

  • Significant disease
  • Previous or current gastrointestinal bleeding, ulcer or perforation
  • Findings of a medical examination and laboratory tests, which require a more detailed examination of the state of health
  • Smoking
  • Hormonal birth control or other regular medication
  • Pregnancy (current or planned) or nursing
Show all 12Show fewer
  • Participation in any other studies involving investigational or marketed drug products within three months prior to the entry into this study
  • Donation of blood within three months prior to the entry into this study
  • Significant overweight / small or hard-to-find veins
  • BMI < 18.5 kg/m2
  • Insufficient Finnish language skills
  • Hypersensitivity or contraindication to study drugs

Trial locations and contacts

1 site in 1 country.

Finland1 site
  • Department of Clinical Pharmacology

    Helsinki

Other trials in Finland

About this study

Official title: KF2022#4-tutkimus:Beetasalpaajan ja tulehduskipulääkkeen Vaikutus CYP-entsyymivälitteiseen lääkeainemetaboliaan

Carvedilol is a non-selective beta-blocker in common clinical use, used to treat hypertension, heart failure, and angina pectoris symptoms associated with coronary artery disease. Diclofenac is a non-selective anti-inflammatory drug in general use, which is used to treat rheumatic diseases, osteoarthritis, musculoskeletal pain conditions, menstrual pains and migraines, among others. In our recent experiments involving liver cell enzymes, both carvedilol and diclofenac were found to inhibit several cytochrome P450 (CYP) enzymes central to drug metabolism, potentially leading to adverse drug interactions with other drugs metabolized by the same enzyme. The purpose of this study is to investigate the effects of the use of carvedilol and diclofenac on the activity of key CYP enzymes in drug metabolism in healthy volunteers using a low-dose model drug combination covering seven CYP enzymes.

In an open three-phase, randomized, crossover study with 12 healthy volunteers, the subjects will receive a drug combination of caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam and simvastatin and as a premedication either placebo, carvedilol or diclofenac. Blood samples will be collected and carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam and simvastatin pharmacokinetics will be monitored up to 23 hours post dose.

Being tested
Caffeine Tablet, Bupropion Hydrochloride Capsels, Repaglinide Capsels, Flurbiprofen Capsels, Omeprazole 10 MG

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Caffeine TabletDrug

    Also called YA Kofeiinitabletti 100 mg, Yliopiston apteekki

    0,5 x 100 mg tablet (50 mg caffeine).

  • Bupropion Hydrochloride CapselsDrug

    Also called Bupropion hydrochloride 20 mg caps, HUS Apteekki

    1 x 20 mg tablet.

  • Repaglinide CapselsDrug

    Also called Repaglinide 0.05 mg caps, HUS Apteekki

    1 x 0,05 mg tablet.

  • Flurbiprofen CapselsDrug

    Also called Flurbiprofen 10 mg caps, HUS Apteekki

    1 x 10 mg tablet.

  • Omeprazole 10 MGDrug

    Also called Losec Mups 10 mg enterotablet, AstraZeneca

    1 x 10 mg tablet.

  • Dextromethorphan Oral SolutionDrug

    Also called Rometor Ratiopharm 2 mg/ml oral solution, Ratiopharm

    5,0 ml of 2 mg/ml oral solution (10 mg dextromethorphan).

  • Midazolam oral solutionDrug

    Also called Midazolam-Ratiopharm 2 mg/ml oral solution, Ratiopharm

    0,5 ml of 2 mg/ml oral solution (1,0 mg midazolam).

  • Simvastatin tabletsDrug

    Also called Simvastatin Krka 10 mg tablet, KRKA

    1 x 10 mg tablet.

  • PlaceboDrug

    Also called Placebo, 9 mm tablet, Yliopiston apteekki

    2 x placebo tablets in the Placebo Phase/Arm

  • CarvedilolDrug

    Also called Carvedilol STADA 25 mg tablet, STADA Arzneimittel AG

    2 x 25 mg tablets

  • DiclofenacDrug

    Also called Voltaren Rapid 50 mg, Novartis Finland Oy

    1 x 50 mg tablet (three times daily for three days)

Study groups in NCT06566794
Study groupRoleWhat they receive
PlaceboPlacebo comparatorPlacebo tablets (2 x Placebo) and 150 ml water at 8.00 a.m. on the study day. Study drug doses (caffeine 50 mg, bupropion 20 mg, repaglinide 0,05 mg, flurbiprofen 10 mg, omeprazole 10 mg, dextromethorphan 10 mg, midazolam 1,0 mg, simvastatin 10 mg) and 250 ml water at 9:00 a.m.
Receives: Drug: Caffeine Tablet; Drug: Bupropion Hydrochloride Capsels; Drug: Repaglinide Capsels; Drug: Flurbiprofen Capsels; Drug: Omeprazole 10 MG; Drug: Dextromethorphan Oral Solution; Drug: Midazolam oral solution; Drug: Simvastatin tablets; Drug: Placebo
CarvedilolActive comparatorCarvedilol tablets (2 x Carvedilol STADA 25 mg) and 150 ml water at 8.00 a.m. on the study day. Study drug doses (caffeine 50 mg, bupropion 20 mg, repaglinide 0,05 mg, flurbiprofen 10 mg, omeprazole 10 mg, dextromethorphan 10 mg, midazolam 1,0 mg, simvastatin 10 mg) and 250 ml water at 9:00 a.m.
Receives: Drug: Caffeine Tablet; Drug: Bupropion Hydrochloride Capsels; Drug: Repaglinide Capsels; Drug: Flurbiprofen Capsels; Drug: Omeprazole 10 MG; Drug: Dextromethorphan Oral Solution; Drug: Midazolam oral solution; Drug: Simvastatin tablets; Drug: Carvedilol
DiclofenacActive comparatorDiclofenac tablet (1 x Voltaren Rapid 50 mg) three times a day around 8.00 a.m., 3.00 p.m. and 9.00 p.m. for three days. Diclofenac tablet (1 x Voltaren Rapid 50 mg) and 150 ml water at 8.00 a.m., 3.00 p.m. and 9.00 p.m. on the study day (3rd day of diclofenac treatment). Study drug doses (caffeine 50 mg, bupropion 20 mg, repaglinide 0,05 mg, flurbiprofen 10 mg, omeprazole 10 mg, dextromethorphan 10 mg, midazolam 1,0 mg, simvastatin 10 mg) and 250 ml water at 9:00 a.m.
Receives: Drug: Caffeine Tablet; Drug: Bupropion Hydrochloride Capsels; Drug: Repaglinide Capsels; Drug: Flurbiprofen Capsels; Drug: Omeprazole 10 MG; Drug: Dextromethorphan Oral Solution; Drug: Midazolam oral solution; Drug: Simvastatin tablets; Drug: Diclofenac

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Area under the plasma concentration - time curve of carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam and simvastatin

    Measured: Prior to and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12 and 23 hours after administration the drugs.

Secondary outcomes (5)
  1. Peak plasma concentration for carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam, simvastatin and their metabolites.

    Measured: Prior to and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12 and 23 hours after administration the drugs.

  2. Half-life for carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam, simvastatin and their metabolites.

    Measured: Prior to and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12 and 23 hours after administration the drugs.

  3. Time to peak plasma concentration for carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam, simvastatin and their metabolites.

    Measured: Prior to and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12 and 23 hours after administration the drugs.

  4. Fractional areas under concentration-time curve (AUC) for carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam, simvastatin and their metabolites.

    Measured: Prior to and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12 and 23 hours after administration the drugs.

  5. Areas under concentration-time curve (AUC) for carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam, simvastatin and their metabolites.

    Measured: Prior to and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12 and 23 hours after administration the drugs.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted22 Aug 2024
  2. Study start22 Aug 2024
  3. Primary completion10 Jan 2025
  4. Study completion10 Jan 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Basic science
Allocation
Randomised
Intervention model
Crossover
Masking
None (open label)
Enrolment
12 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06566794
Sponsor's protocol ID
KF2022#4
Other IDs
2023-000002-25, 2023
Acronym
KF2022#4
Status last verified
Mar 2026
First submitted
4 Aug 2024
Last updated
6 Mar 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Caffeine Tablet, Bupropion Hydrochloride Capsels and Repaglinide Capsels in people with Drug Interaction, run by Helsinki University Central Hospital at 1 site in Finland.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 6 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Finland. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Area under the plasma concentration - time curve of carvedilol, diclofenac, caffeine, bupropion, repaglinide, flurbiprofen, omeprazole, dextromethorphan, midazolam and simvastatin (time frame: Prior to and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12 and 23 hours after administration the drugs.). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Mar 2026.

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