We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Effect of Metamizole (Dipyrone) on Renal Function in Salt-depleted Healthy Subjects

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01995006
Recruitment Status : Completed
First Posted : November 26, 2013
Last Update Posted : April 17, 2015
Information provided by (Responsible Party):
University Hospital, Basel, Switzerland

Brief Summary:

The planned study is a single-center, randomized, open-label parallel group study in 16 healthy male subjects. Study subjects will be randomly allocated either to the metamizole group (1) or to the naproxen group (2). All participants will start with a low sodium diet (approximately 50 mmol Na+ per day) 7 days before the first drug intake and maintain the diet until the end of the study (14 days in total). Salt-depletion is an accepted model to enhance production of vasodilatory prostaglandins and to increase renal sensitivity to prostaglandin inhibition. On the first day of treatment (Day 1), a single dose of metamizole or naproxen will be administered to investigate the effects after a single dose and to collect single dose pharmacokinetic profiles. Starting on Day 2, all participants will receive therapeutic doses, i.e. 1000 mg metamizole 'ter in die' (TID, three times a day) or 500 mg naproxen 'bis in die' (BID, twice a day) for one week and on Day 7 pharmacokinetics and pharmacodynamics effects will be assessed under near steady-state conditions.

The primary objective is the characterization of the renal effects of metamizole by determination of the glomerular filtration rate (GFR) using the inulin clearance. Secondary objectives are the characterization of the urinary excretion of prostaglandin E2 (PGE2) and the prostaglandin I2 (PGI2) metabolite 6-keto-prostaglandin F1 (PGF1)alpha as well as the urinary excretion of sodium and potassium.

Overall, clinical experience suggests better renal tolerability of metamizole possibly due to less potent COX-inhibition compared to classical nonsteroidal antiinflammatory drugs (NSAIDs). If this could be confirmed, metamizole would be a valuable alternative for treatment of painful conditions in patients with impaired renal function. Therefore, the aim of this study is to examine the effects of metamizole on renal function in comparison with the non-specific COX-inhibitor naproxen.

Condition or disease Intervention/treatment Phase
Healthy Drug: metamizole Drug: Naproxen Phase 1

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 15 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Effect of Metamizole on Renal Function in Salt-depleted Healthy Subjects Single-center, Randomized, Open, Controlled Parallel-group Study to Investigate the Effects of Oral Metamizole or Naproxen on Renal Function in Healthy Male Salt-depleted Subjects
Study Start Date : January 2014
Actual Primary Completion Date : April 2014
Actual Study Completion Date : April 2014

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Kidney Tests Sodium

Arm Intervention/treatment
Experimental: Metamizole
Metamizole 1000mg TID Day 1 till Day 7
Drug: metamizole
metamizol tablets (500mg): 1000mg TID during 7 days
Other Name: dipyrone

Active Comparator: Naproxen
Naproxen 500 mg BID Day 1 till Day 7
Drug: Naproxen
Naproxen tablets (500mg): 500 mg BID during 7 days
Other Name: Naproxen sodium

Primary Outcome Measures :
  1. Glomerular filtration rate (GFR) [ Time Frame: up to 7 days ]

Secondary Outcome Measures :
  1. Measurement of the urinary excretion of the prostaglandin E2 (PGE2) and of the prostacyclin (PGI2) metabolite 6-keto-PGF1alpha [ Time Frame: Day 1 and Day 7 ]
  2. Measurement of urine levels of sodium, potassium and creatinine and the urinary output [ Time Frame: Day 1 and Day 7 ]
  3. Plasma pharmacokinetic (PK) parameters of each drug will be derived either directly from observed data or by analysis of the concentration-time profiles [ Time Frame: Day 1 and Day 7 ]
    • The maximum plasma concentration (Cmax) and time to reach Cmax (tmax)
    • The terminal elimination rate constant with the respective half-life (t½)
    • The area under the plasma concentration-time curve from zero to different time points (AUC0-24, AUC0-∞)

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy male subjects aged between 18 and 45 years (inclusive) at screening
  • BMI between 18 and 28 kg/m2 (inclusive) and body weight at least 50 kg at screening.
  • systolic blood pressure (SBP): 100-140 mmHg, diastolic blood pressure (DBP): 60-90 mmHg and heart rate (HR): 45-90 bpm (inclusive), measured on the leading arm*, in the supine position at screening.
  • No clinically significant findings on the physical examination at screening.
  • 12-lead ECG without clinically relevant abnormalities at screening.
  • Signed informed consent prior to any study-mandated procedure.
  • Hematology and clinical chemistry results not deviating from the normal range to a clinically relevant extent at screening.
  • Ability to communicate well with the investigator and to understand and comply with the requirements of the study.

    • leading arm right = writing with right hand

Exclusion Criteria:

  • Smoking > 5 cigarettes per day.
  • History or clinical evidence of alcoholism or drug abuse within the 3-year period prior to screening.
  • Loss of ≥ 250 ml of blood within 3 months prior to screening.
  • Treatment with an investigational drug within 30 days prior to screening.
  • Previous treatment with any prescribed or over-the-counter (OTC) medication (including herbal medicines such as St John's Wort) within 2 weeks prior to the intended start of the study.
  • Legal incapacity or limited legal capacity at screening.
  • Positive results from urine drug screen at screening.
  • History or clinical evidence of any disease (e.g. GIT-disease: Morbus Crohn, Colitis Ulcerosa, anamnestic gastrointestinal bleeding) and/or existence of any surgical or medical condition, which might interfere with the absorption, distribution, metabolism or excretion of the study drugs, or which might increase the risk for toxicity.
  • Known hypersensitivity to Aspirin or other NSAIDs or any excipients of the drug formulations.
  • Known food allergy, which make the adherence to the diet impossible
  • Any circumstances or conditions, which, in the opinion of the investigator, may affect full participation in the study or compliance with the protocol.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01995006

Layout table for location information
Phase I Research Unit, University Hospital
Basel, Switzerland
Sponsors and Collaborators
University Hospital, Basel, Switzerland
Layout table for investigator information
Principal Investigator: Manuel Haschke, PD University Hospital, Basel, Switzerland
Layout table for additonal information
Responsible Party: University Hospital, Basel, Switzerland
ClinicalTrials.gov Identifier: NCT01995006    
Other Study ID Numbers: EKBB 264/13
First Posted: November 26, 2013    Key Record Dates
Last Update Posted: April 17, 2015
Last Verified: April 2015
Keywords provided by University Hospital, Basel, Switzerland:
Additional relevant MeSH terms:
Layout table for MeSH terms
Anti-Inflammatory Agents, Non-Steroidal
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Inflammatory Agents
Antirheumatic Agents
Gout Suppressants
Cyclooxygenase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action