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Hematological Safety of Dipyrone Versus Paracetamol After Dental Extractions

4 november 2026 uppdaterad av: Matheus Furtado de Carvalho

Hematological Alterations Associated With the Use of Dipyrone Versus Paracetamol After Dental Extractions: a Double-blind, Randomized Clinical Trial

The goal of this clinical trial is to compare the safety of dipyrone and paracetamol when used for pain relief after dental extractions in adults. The study will focus on changes in blood cell counts and will also evaluate liver and kidney function and possible side effects. The main questions it aims to answer are:

  • Do dipyrone and paracetamol have different effects on blood cell counts after dental extractions?
  • Do participants exhibit hepatic and renal alterations?
  • What side effects do participants experience when taking these medications?

Researchers will compare dipyrone and paracetamol to learn more about their safety after dental extractions.

Participants will:

  • Undergo two dental extractions, one during each study period, involving teeth that already need to be removed
  • Take dipyrone 500 mg or paracetamol 750 mg in a random order, taking two capsules every 6 hours for 7 days during each period
  • Have at least 21 days between the two study periods
  • Have three blood collections: one before the first extraction and one on the eighth day after each extraction
  • Keep a diary of their pain, medication use, and possible side effects
  • Have their blood pressure checked and attend clinic visits and telephone follow-ups to monitor their health

Studieöversikt

Status

Rekrytering

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Dental extractions are commonly followed by pain, and medications such as dipyrone and paracetamol are used to help relieve this pain. Although both medications are widely used, it is important to better understand their safety, particularly their possible effects on blood cell counts.

This clinical trial aims to compare the safety of dipyrone and paracetamol in adults undergoing dental extractions. The main focus is to evaluate changes in blood cell counts, including white blood cells, neutrophils, red blood cells, and platelets. The study will also assess blood tests related to liver and kidney function, changes in blood pressure and possible side effects during treatment.

Participants will undergo two dental extractions, one during each study period, involving teeth that already require removal. The order in which participants receive the medications will be determined randomly. During one study period, participants will receive dipyrone 500 mg per dose, and during the other, they will receive paracetamol 750 mg per dose. Each dose will consist of two capsules. The medications will be provided in identical capsules and will be prepared by a compounding pharmacy in Brazil, according to the study protocol. Neither participants nor researchers will know which medication is being used during each period. Each treatment period will last 7 days, with two capsules taken every 6 hours, according to the study protocol. The two study periods will be separated by at least 21 days.

Blood samples will be collected three times: before the first dental extraction and on the eighth day after each extraction. These tests will allow researchers to compare blood cell counts and other laboratory results before and after each medication period. Participants will also record their pain levels, medication use, and possible side effects in a diary. Blood pressure will be monitored, and clinical assessments and telephone contacts will be used to follow participants' health and identify possible adverse reactions.

By comparing the results obtained during the two treatment periods, researchers hope to improve understanding of the safety of dipyrone and paracetamol when used after dental extractions. The findings may contribute to evidence-based decisions about pain management following dental surgery.

Studietyp

Interventionell

Inskrivning (Beräknad)

50

Fas

  • Fas 4

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Brasilien
    • Minas Gerais
      • Juiz de Fora, Minas Gerais, Brasilien, 36036-900

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 60 år (Vuxen)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  • Healthy patients of both sexes, aged 18 to 60 years
  • Indication for bilateral tooth extraction in similar positions

Exclusion Criteria:

  • History of allergy to dipyrone or paracetamol.
  • Insufficient or improperly completed study records.
  • Failure to return for the second tooth extraction.
  • Use of warfarin, bupropion, efavirenz, methadone, cyclosporine, tacrolimus, sertraline, valproate, methotrexate, acetylsalicylic acid, or other non-steroidal anti-inflammatory drugs (NSAIDs), analgesics, or corticosteroids on a continuous basis (for 7 days or longer) prior to surgery.
  • Systemic conditions that could interfere with hematological outcomes, including diagnosed hematological disorders, coagulopathies, severe liver or kidney disease, or active autoimmune diseases at the time of the appointment.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Crossover tilldelning
  • Maskning: Dubbel

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Arm 1: Paracetamol followed by dipyrone

Participants receive paracetamol 750 mg per dose during the first treatment period, following the first dental extraction, and dipyrone 500 mg per dose during the second treatment period, following the second dental extraction, according to the randomized crossover sequence. Each treatment is administered as two capsules every 6 hours for 7 days, with a washout period between treatments.
Läkemedel: Dipyrone administration

Dipyrone 500 mg per dose, administered orally as two capsules every 6 hours for 7 days following dental extraction, according to the study protocol.

Läkemedel: Paracetamol (drug)

Paracetamol 750 mg per dose, administered orally as two capsules every 6 hours for 7 days following dental extraction, according to the study protocol

Procedur: blood sampling

Blood samples will be collected at three time points: before the first dental extraction, on the eighth day after the first treatment period, and on the eighth day after the second treatment period.
Experimentell: Dipyrone followed by paracetamol

Participants receive dipyrone 500 mg per dose during the first treatment period, following the first dental extraction, and paracetamol 750 mg per dose during the second treatment period, following the second dental extraction, according to the randomized crossover sequence. Each treatment is administered as two capsules every 6 hours for 7 days, with a washout period between treatments.
Läkemedel: Dipyrone administration

Dipyrone 500 mg per dose, administered orally as two capsules every 6 hours for 7 days following dental extraction, according to the study protocol.

Läkemedel: Paracetamol (drug)

Paracetamol 750 mg per dose, administered orally as two capsules every 6 hours for 7 days following dental extraction, according to the study protocol

Procedur: blood sampling

Blood samples will be collected at three time points: before the first dental extraction, on the eighth day after the first treatment period, and on the eighth day after the second treatment period.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
White Blood Cell Parameters.
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Total leukocyte count and neutrophil count will be assessed through blood samples and reported as cells/mm³, to evaluate changes following treatment with dipyrone and paracetamol after dental extractions.
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.
Hemoglobin Level.
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Hemoglobin level will be assessed in blood samples, and reported as g/dL, to evaluate changes following treatment with dipyrone and paracetamol after dental extractions.
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.
Hematocrit.
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Hematocrit will be assessed in blood samples, and reported as %, to evaluate changes following treatment with dipyrone and paracetamol after dental extractions.
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.
Platelet Count
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Platelet count will be assessed in blood samples, and reported as cells/mm³, to evaluate changes following treatment with dipyrone and paracetamol after dental extractions.
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Changes in Liver Function Biomarkers.
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Changes in aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyl transferase (GGT), and alkaline phosphatase levels will be assessed through blood samples collected during the study, and reported as U/L.
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.
Changes in Kidney Function Biomarkers.
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Changes in creatinine and urea levels will be assessed through blood samples collected during the study, and reported as mg/dL.
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.
Adverse Reactions.
Tidsram: Daily, from day 1 to day 7 after each dental extraction.

Occurrence of adverse reactions associated with dipyrone and paracetamol will be monitored and recorded during each postoperative treatment period.
Daily, from day 1 to day 7 after each dental extraction.
Systolic Blood Pressure
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Systolic blood pressure measurements will be recorded to evaluate changes during treatment with dipyrone and paracetamol after dental extractions, and reported as mmHg
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.
Diastolic Blood Pressure.
Tidsram: Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Diastolic blood pressure measurements will be recorded to evaluate changes during treatment with dipyrone and paracetamol after dental extractions, and reported as mmHg
Before the first dental extraction, day 8 after the first dental extraction, and day 8 after the second dental extraction.

Samarbetspartners och utredare

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Sponsor

Matheus Furtado de Carvalho

Publikationer och användbara länkar

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Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

13 november 2026

Primärt slutförande (Beräknad)

31 juli 2027

Avslutad studie (Beräknad)

31 juli 2027

Studieregistreringsdatum

Först inskickad

27 oktober 2026

Först inskickad som uppfyllde QC-kriterierna

4 november 2026

Första postat (Faktisk)

5 november 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

6 november 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

4 november 2026

Senast verifierad

1 oktober 2026

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 97343326.1.0000.5147

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

NEJ

IPD-planbeskrivning

Individual participant data will not be shared with researchers outside the study team. Data access will be restricted to authorized researchers, and participant confidentiality will be protected through data coding, password-protected digital files, and restricted access to physical documents, in accordance with applicable data protection requirements.

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