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Quantification of Diclofenac 2.32% (Voltaren) in Rinse Water After Different Application Methods

Quantification of Diclofenac 2.32% (Voltaren) in Rinse Water After Different Application Methods

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06954181
Enrollment
33
Registered
2025-05-01
Start date
2025-03-26
Completion date
2025-04-11
Last updated
2026-06-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Participants

Brief summary

The purpose of this study is to quantify the amount of diclofenac in rinse water after application of the test product (Voltaren® Schmerzgel forte; 2.32 percent \[%\]) containing 2.32% Diclofenac-N-Ethylethanamin either by hand or using an applicator and subsequent washing and/or wiping.

Detailed description

This will be an exploratory, open label, crossover study. Participants with healthy skin on the elbows and hands will be enrolled. The amount of diclofenac in rinse water after application of the test product (Voltaren® Schmerzgel forte; 2.32%) containing 2.32% Diclofenac-N-Ethylethanamin will be assessed after three different washing methods, with and without use of an applicator in a crossover design. There will be a wash-out period of at least 2 days in between each method. Approximately 40 participants will be enrolled in this study.

Interventions

DRUGVoltaren® Schmerzgel forte; 2.32% (Test Product)

Voltaren® Schmerzgel forte; 2.32% containing 2.32% Diclofenac-N-Ethylethanamin.

Sponsors

HALEON
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
Yes

Inclusion criteria

* Written informed consent to participate in the study. * Willingness to actively participate in the study and to come to the scheduled visits. * Female and/or male. * From 18 to 70 years of age.

Exclusion criteria

* Female participants: Pregnancy or lactation. * Drug addicts, alcoholics. * Acquired immunodeficiency syndrome (AIDS), human immunodeficiency virus (HIV)-positive or infectious hepatitis. * Conditions which exclude a participation or might influence the test reaction/evaluation. * Participation or being in the waiting period after participation in cosmetic and/or pharmaceutical studies pertaining to the test area. * Cancer not being diagnosed as cured and requiring chemotherapy, irradiation and/or hormonal treatment within the last 2 years. * A previous allergic reaction, sensitivity or intolerance to diclofenac or any of the other ingredients in Voltaren® Schmerzgel forte. * Participants in whom asthma, angioedema, urticaria or acute rhinitis are precipitated by acetyl salicylic acid or other non-steroidal anti-inflammatory drugs (example, ibuprofen, naproxen et cetera). * Documented allergies to cosmetic products. * Active skin disease at the test area. * Wounds, moles, tattoos, scars, irritated skin, excessive hair growth, et cetera, at the test area that could influence the investigation. * Any topical medication at the test area within the last 3 days prior to the start of the study.

Design outcomes

Primary

MeasureTime frameDescription
Concentration of Voltaren® Schmerzgel Forte; 2.32% (Diclofenac) in Water (Milligrams Per Liter [mg/L]) After WashingDay 1, Day 3 and Day 5The concentration of diclofenac in rinse water samples (mg/L) collected after application of the test product (Voltaren® Schmerzgel forte; 2.32%) was determined with High-performance liquid chromatography (HPLC).
Amount of Test Product Residues by Gravimetrical Measurements (in Gram)Day 1, Day 3 and Day 5Test product (Voltaren® Schmerzgel forte; 2.32%) residue was collected using Method 3 (application of the test product using an applicator and subsequent wiping with a paper towel). The paper towels were weighed before and after wiping the test area. The amount of test product residue (gram) in paper towel= The weight of paper towel after product application minus weight of paper towel before product application.

Countries

Germany

Participant flow

Recruitment details

The study was conducted at a single center in Germany.

Baseline characteristics

Characteristic
Age, Continuous57 years
STANDARD_DEVIATION 10.9
Sex: Female, Male
Female
27 Participants
Sex: Female, Male
Male
6 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 330 / 330 / 33
other
Total, other adverse events
0 / 330 / 330 / 33
serious
Total, serious adverse events
0 / 330 / 330 / 33

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 17, 2026