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Hematological Safety of Dipyrone Versus Paracetamol After Dental Extractions

4. november 2026 oppdatert 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

Studieoversikt

Status

Rekruttering

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

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.

Studietype

Intervensjonell

Registrering (Antatt)

50

Fase

  • Fase 4

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

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

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 60 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

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

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Crossover-oppdrag
  • Masking: Dobbelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: 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.
Legemiddel: 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.

Legemiddel: 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

Fremgangsmåte: 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.
Eksperimentell: 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.
Legemiddel: 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.

Legemiddel: 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

Fremgangsmåte: 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.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
White Blood Cell Parameters.
Tidsramme: 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.
Tidsramme: 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.
Tidsramme: 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
Tidsramme: 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.

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Changes in Liver Function Biomarkers.
Tidsramme: 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.
Tidsramme: 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.
Tidsramme: 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
Tidsramme: 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.
Tidsramme: 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.

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Matheus Furtado de Carvalho

Publikasjoner og nyttige lenker

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Generelle publikasjoner

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

13. november 2026

Primær fullføring (Antatt)

31. juli 2027

Studiet fullført (Antatt)

31. juli 2027

Datoer for studieregistrering

Først innsendt

27. oktober 2026

Først innsendt som oppfylte QC-kriteriene

4. november 2026

Først lagt ut (Faktiske)

5. november 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

5. november 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

4. november 2026

Sist bekreftet

1. oktober 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • 97343326.1.0000.5147

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

IPD-planbeskrivelse

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.

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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