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Comparison of the Bioavailability of Diclofenac in a Combination Product (Diclofenac 2% + Capsaicin 0.075% Topical Gel) With Two Diclofenac Only Products, Diclofenac Mono Gel 2% and Voltarol® 12 Hour Emulgel 2.32% Gel, in Healthy Volunteers

Boehringer Ingelheim logo

Boehringer Ingelheim

Status and phase

Completed
Phase 1

Conditions

Healthy

Treatments

Drug: Diclofenac Sodium Topical Gel
Drug: Diclofenac & Capsaicin
Drug: Diclofenac Sodium

Study type

Interventional

Funder types

Industry

Identifiers

Details and patient eligibility

About

The main objective of this study is to assess the relative systemic bioavailability of diclofenac in the presence and absence of capsaicin by comparing the systemic bioavailability of diclofenac from a combination product (Diclofenac 2% + Capsaicin 0.075% Topical Gel) with two diclofenac only products, Diclofenac Mono Gel 2% and Voltarol® 12 Hour Emulgel 2.32% Gel, following topical administration.

In order to examine potential racial differences in pharmacokinetics (PK), the study population will be stratified 50:50, Caucasian versus Black people. With respect to the main objective, additionally a supportive analysis will be performed to investigate the influence of race on the intra-individual bioavailability ratios.

Enrollment

48 patients

Sex

All

Ages

18 to 50 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Healthy males and females, 18 to 50 years (inclusive) at time of screening.

  • Body mass index (BMI) between 18.5 and 29.9 kg/m2 (inclusive).

  • Body mass not less than 50 kg for males and females.

  • Findings for medical history, vital signs, physical examination, standard 12-lead electrocardiogram (ECG) and laboratory investigations must be normal or within laboratory reference ranges for the relevant laboratory tests, unless the PI considers the deviation to be not clinically significant for the purpose of the study.

  • Non-smokers.

  • Females, if:

    • Not of childbearing potential,

    • Of childbearing potential, the following conditions are to be met:

      • Negative pregnancy test.
      • Not lactating.
      • Abstaining from sexual activity (if this is the usual lifestyle of the subject) or must agree to use an accepted method of contraception, and agree to continue with the same method throughout the study.
  • Written informed consent given for participation in the study.

  • Further inclusion criteria apply.

Exclusion criteria

  • Evidence of psychiatric disorder, antagonistic personality, poor motivation, emotional or intellectual problems likely to limit the validity of consent to participate in the study or limit the ability to comply with protocol requirements.
  • Current alcohol use > 21 units of alcohol per week for males and > 14 units of alcohol per week for females. One unit (10 g alcohol) is equal to beer (330 mL), wine (200 mL), or distilled spirits (25 mL) per day.
  • Regular exposure to substances of abuse (other than alcohol) within the past year.
  • Use of any medication, prescribed or over-the-counter (especially products containing diclofenac or use of other oral nonsteroidal anti-inflammatory drugs [NSAIDS]) or herbal remedies, within 2 weeks before the first administration of Investigational medicinal product (IMP) except if this will not affect the outcome of the study in the opinion of the PI (Principal Investigator) (in collaboration with the Sponsor). In this study the concomitant use of hormonal contraceptives is allowed.
  • Participation in another study with an experimental drug, where the last administration of the previous IMP was within 8 weeks (or within 5 elimination half-lives for chemical entities or 2 elimination half-lives for anti-bodies or insulin), whichever is the longer before administration of IMP in this study, at the discretion of the PI.
  • Treatment within the previous 3 months before the first administration of IMP with any drug with a well-defined potential for adversely affecting a major organ or system.
  • A major illness during the 3 months before commencement of the screening period.
  • History of hypersensitivity or allergy (acute rhinitis, angioedema, urticaria or bronchial asthma) to the IMP or its excipients or any related medication (Aspirin or any other NSAID).
  • History of hypersensitivity or allergy to cayenne pepper or other capsaicinoids (paprika plants).
  • History of bronchospasm or bronchial asthma, arterial hypertension, myocardial infarction, thrombotic events, stroke, congestive heart failure, impaired renal function or liver disease.
  • History or current diagnosis of gastrointestinal bleeding or peptic ulcer disease.
  • Relevant history or laboratory or clinical findings indicative of acute or chronic disease, likely to influence study outcome.
  • Donation or loss of blood equal to or exceeding 500 mL during the 8 weeks before the first administration of IMP (Investigational medicinal product) .
  • Bruises, damaged skin, eczema or wounds on the application site, or the application site inappropriate for applying the IMP in the opinion of the PI (Principal Investigator).
  • Further exclusion criteria apply.

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Crossover Assignment

Masking

None (Open label)

48 participants in 3 patient groups

Diclofenac Sodium (A)
Experimental group
Treatment:
Drug: Diclofenac Sodium
Diclofenac & Capsaicin (B)
Experimental group
Treatment:
Drug: Diclofenac & Capsaicin
Diclofenac Sodium Topical Gel
Active Comparator group
Treatment:
Drug: Diclofenac Sodium Topical Gel

Trial documents
2

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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