ClinicalTrials.gg
CompletedNCT00948428Updated Sep 4, 2020Results posted

Bioequivalence of Generic Imiquimod Cream, 5% When Compared to Aldara™ (Imiquimod) Cream, 5% in the Treatment of Actinic Keratosis

A Phase 3 interventional study of imiquimod and Aldara™ in Actinic Keratoses, sponsored by Actavis Inc.. Completed at 20 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2020-09-04.

Sponsored by Actavis Inc. (part of Teva Pharmaceutical Industries, Ltd.) · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
462
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 23 studies testing imiquimod in Keratosis, Actinic — 1 open to participants now, 1 under way, 1 of them phase 3. Imiquimod · Keratosis, Actinic.

Enrollment
8th of 22
462 · median 253
Started
2008
with 6 others
Phase 3
9 of 23
1 open now
Registered
14th of 23
by date
Lead sponsor
2 of 23
Actavis Inc.

Among the 23 studies testing imiquimod in Keratosis, Actinic, this one is the 8th largest by enrollment of the 22 interventional ones that give a count, is one of 7 that started in 2008, is one of 9 in phase 3, and was the 14th registered.

Keratosis, Actinic

343 studies on the registry are indexed under Keratosis, Actinic; 29 are open to participants now.

Browse Keratosis, Actinic studies →

Open to participants now

1 of the 23 studies testing imiquimod in Keratosis, Actinic is open now, in 1 country. Recruiting first, the newest first:

By country, each count listing its studies:

About imiquimod

Imiquimod: first FDA approval 1997 (ALDARA), first EMA approval 1998. What it is approved for, and how studies give it, is on its page →

Who these studies take

Of the 21 Keratosis, Actinic studies recruiting now, 16 (76%) set no upper age limit and 1 (5%) stop at 75 or younger; 0 take children under 18; 2 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 23 studies testing imiquimod in Keratosis, Actinic, or all of them as a file.
02

Study summary

At the end of the study, safety and efficacy outcome measures will be compared to determine a) if dosing with Generic Imiquimod cream, 5% is therapeutically equivalent to the currently marketed Aldara (imiquimod) cream, 5% and b) if both imiquimod 5% creams are superior in comparison to the Vehicle cream.

Read the detailed description

A nationwide, multicenter, double-blind, vehicle-controlled parallel group comparison study of a Generic Imiquimod cream, 5% (Actavis Mid-Atlantic LLC) and currently marketed Aldara (imiquimod) cream, 5% (distributed by Graceway Pharmaceuticals, LLC) was conducted in subjects with actinic keratoses (AKs) on the face and/or anterior scalp in order to evaluate the therapeutic equivalence of these two active treatments and to establish superiority of the efficacy of these two products over a Vehicle cream. Subjects were randomized to one of three treatment groups on a 2:2:1 basis as follows: (1) Generic Imiquimod cream, 5%, (2) Aldara (imiquimod) cream, 5%, and (3) Vehicle cream. The duration of treatment was 16 weeks (± 7 days).

The primary efficacy endpoint was the proportion of subjects in each treatment group with Complete Clearance (having no clinically visible actinic keratosis lesions in the 25 cm2 contiguous treatment area at the 8-week post-treatment visit) of AK lesions. The secondary efficacy endpoints were the Partial Clearance rates, defined as the proportion of subjects with at least a 75% reduction in the number of AK lesions counted at Baseline at the end-of-treatment visit (Week 16, EOT) and at the 8 weeks post-treatment visit/test-of-cure (Week 24, TOC), and the proportion of subjects with Complete Clearance of AK lesions at the end-of-treatment (Week 16, EOT) visit.

A 90% Wald's confidence interval with Yate's continuity correction was constructed around the difference between the proportions of subjects with Complete Clearance of AK lesions in the active treatments (Generic Imiquimod minus Aldara) to evaluate therapeutic equivalence in the primary efficacy analyses. Two-sided, continuity-corrected statistics were used to evaluate the superiority of each active treatment's Complete Clearance rate over that of the Vehicle treatment. The therapeutic comparability evaluations in the per-protocol (PP) population were considered primary while those in the intent-to-treat (ITT) population were considered supportive. The superiority comparisons in the ITT population were considered primary while those in the PP population were considered supportive. If the 90% confidence interval (CI) around the difference between the Generic Imiquimod and Aldara Complete Clearance rates in the PP population were contained within the interval 0.20 to +0.20, and each of these rates was greater than, and statistically different (p\<0.05) from, the Vehicle rate in the ITT population, then Generic Imiquimod and Aldara were considered to be therapeutically equivalent.

Secondary efficacy analyses were conducted on the proportion of subjects in each treatment group with Complete Clearance of AK lesions at the Week 16, EOT visit as well as evaluation of the Partial Clearance of AK lesions at both the EOT and TOC visits. The results at both the EOT visit (Week 16) and those at 8 weeks post-treatment (Week 24, TOC) were statistically analyzed by the same methods described for the primary efficacy variable.

Both EOT and TOC analyses were conducted in the ITT population. The TOC analysis was conducted in the PP population and the EOT analysis was conducted in the EOT PP population.

03

Conditions studied

  • Actinic Keratoses

Browse trials for

Keywords

  • actinic keratoses
  • imiquimod
  • therapeutic equivalence
  • bioequivalence
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Subjects were male or non-pregnant females, 18 years of age or older, in generally good health. Females who were , surgically sterile or using a medically acceptable form of with a negative urine pregnancy test at the Baseline visit.
  • Subjects provided written and verbal .
  • Subjects presented to the clinic with at least 4 but no more than 12 visible, discrete nonhyperkeratotic, nonhypertrophic actinic keratosis lesions within a 25 cm2 Treatment Area on the face and/or anterior scalp.
  • Subjects were willing and able to comply with study instructions and return to the clinic for required visits.

Exclusion criteria

Exclusion Criteria:

  • Subjects who were lactating, or planning to become pregnant during the study.
  • Subjects had hyperkeratotic, hypertrophic or large mat-like AKs within the 25 cm2 Treatment Area.
  • Subjects who had the need or were planning to be exposed to artificial tanning devices or excessive sunlight during the trial.
  • Subjects who were (e.g., , systemic , graft vs. host disease, etc.).
  • Subjects who experienced an unsuccessful outcome from previous imiquimod therapy.
  • Subjects with known or previous allergic reaction to any of the active or inactive components of the study drugs.
  • Within 2 months: Facial and/or Anterior Scalp: laser resurfacing, photodynamic therapy, chemical peels, dermabrasion, topical application of 5-FU, imiquimod, diclofenac sodium or other treatments for AK or photodamage.
  • Subjects who used the following systemic, oral or topical therapies for the periods specified prior to entry into the study:

Within 2 days: Topicals of any kind to the selected Treatment Area. Within 2 weeks: Facial topical medications: , alpha- hydroxyacids (e.g., glycolic acid, lactic acid, etc. greater than 5%), beta-hydroxyacid (salicylic acid greater than 2%), urea - greater than 5% or prescription retinoids (e.g., tazarotene, adapalene, tretinoin) to the face and/or anterior scalp.

Within 2 weeks: Cryotherapy to lesions adjacent to or within the 25 cm2 Treatment Area.

Within 4 weeks: Systemic steroid therapy: chemotherapeutic agents, psoralens, immunotherapy, or retinoids.

Terms in these criteria, in plain language(8)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
462 participants (actual)

Study arms

  • Active comparator
    Generic Imiquimod

    imiquimod cream, 5%

    Drug: imiquimod

  • Active comparator
    Aldara™

    Aldara™ (imiquimod) cream, 5%

    Drug: Aldara™

  • Placebo comparator
    Vehicle cream

    Vehicle cream (Actavis)

    Drug: Vehicle Cream

Interventions

  • 5% topical cream dispensed in individual 0.25 g sachets applied twice a week for 16 weeks

  • 5% topical cream dispensed in individual 0.25 g sachets applied twice a week for 16 weeks

  • DrugVehicle Cream

    Topical cream vehicle matching Generic imiquimod dispensed in individual 0.25 g sachets applied twice a week for 16 weeks

06

What researchers measure

Primary outcomes

  1. Percentage of Subjects in Each Treatment Group With Complete Clearance of AK Lesions at the Test of Cure Visit (Week 24)

    Time frame: Week 24

Secondary outcomes

  1. Percentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to End of Treatment (EOT) Visit (Week 16).

    Time frame: Week 16

  2. Percentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to 8 Weeks Post Treatment (Test of Cure Visit).

    Time frame: Week 24

07

Results

Posted Sep 4, 2020

Participant flow

Participant flow — Overall Study
MilestoneGeneric ImiquimodAldara™Vehicle Cream
Started18518592
Completed16716784
Not completed18188
Withdrew: Withdrawal by subject6127
Withdrew: Adverse event630
Withdrew: Lost to follow-up211
Withdrew: Death200
Withdrew: Intercurrent illness100
Withdrew: Non-compliance120

Outcome measures

PrimaryPercentage of Subjects in Each Treatment Group With Complete Clearance of AK Lesions at the Test of Cure Visit (Week 24)
Time frame:
Week 24
Reported as:
Count of participants · Participants
Percentage of Subjects in Each Treatment Group With Complete Clearance of AK Lesions at the Test of Cure Visit (Week 24)
ParticipantsGeneric ImiquimodAldara™Vehicle Cream
Percentage of Subjects in Each Treatment Group With Complete Clearance of AK Lesions at the Test of Cure Visit (Week 24)74727
Statistical analysis
  • Generic Imiquimod vs Aldara™ · Mean difference (net): -0.85 · 90% CI -10.84 to 9.15
  • Generic Imiquimod vs Vehicle Cream · ANOVA · p = 0.0001
SecondaryPercentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to End of Treatment (EOT) Visit (Week 16).
Time frame:
Week 16
Reported as:
Count of participants · Participants
Percentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to End of Treatment (EOT) Visit (Week 16).
ParticipantsGeneric ImiquimodAldara™Vehicle Cream
Percentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to End of Treatment (EOT) Visit (Week 16).11011414
Statistical analysis
  • Generic Imiquimod vs Aldara™ · Mean difference (net): -3.1 · 90% CI -12.11 to 5.95
SecondaryPercentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to 8 Weeks Post Treatment (Test of Cure Visit).
Time frame:
Week 24
Reported as:
Count of participants · Participants
Percentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to 8 Weeks Post Treatment (Test of Cure Visit).
ParticipantsGeneric ImiquimodAldara™Vehicle Cream
Percentage of Subjects With at Least a 75% Reduction in the Number of AK Lesions From Baseline to 8 Weeks Post Treatment (Test of Cure Visit).77777
Statistical analysis
  • Generic Imiquimod vs Aldara™ · Mean difference (net): -0.5 · 90% CI -9.92 to 8.88

Adverse events

Collected over 24 Weeks. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Generic Imiquimod1/181 (0.6%)4/181 (2.2%)79/181 (43.6%)
Aldara™0/179 (0%)2/179 (1.1%)60/179 (33.5%)
Vehicle Cream0/89 (0%)2/89 (2.2%)25/89 (28.1%)
Most frequent serious events
Showing 10 of 13
Most frequent serious events
EventGeneric ImiquimodAldara™Vehicle Cream
Chest painGeneral disorders0/1810/1791/89
Gastrointestinal neoplasmNeoplasms benign, malignant and unspecified (incl cysts and polyps)0/1810/1791/89
Carotid artery atenosisNervous system disorders0/1810/1791/89
AppendicitisInfections and infestations0/1811/1790/89
Hip fractureInjury, poisoning and procedural complications0/1811/1790/89
AnaemiaBlood and lymphatic system disorders1/1810/1790/89
Acute myocardial infarctionCardiac disorders1/1810/1790/89
OsteoarthritisMusculoskeletal and connective tissue disorders1/1810/1790/89
Mixed hepatocellular cholangiocarcinomaNeoplasms benign, malignant and unspecified (incl cysts and polyps)1/1810/1790/89
Pulmonary embolismRespiratory, thoracic and mediastinal disorders1/1810/1790/89
Most frequent other events
Showing 10 of 135
Most frequent other events
EventGeneric ImiquimodAldara™Vehicle Cream
NauseaGastrointestinal disorders1/1817/1790/89
NasopharyngitisInfections and infestations5/1816/1793/89
Squamous cell carcinoma of skinNeoplasms benign, malignant and unspecified (incl cysts and polyps)4/1812/1793/89
SinusitisInfections and infestations6/1811/1791/89
HeadacheNervous system disorders6/1815/1792/89
Basal cell carcinomaNeoplasms benign, malignant and unspecified (incl cysts and polyps)5/1813/1792/89
Dermatitis contactSkin and subcutaneous tissue disorders5/1810/1791/89
Urinary tract infectionInfections and infestations1/1814/1790/89
MyalgiaMusculoskeletal and connective tissue disorders4/1811/1790/89
LethargyNervous system disorders2/1813/1790/89

Baseline characteristics

Using Intent-to-Treat Population

Age, Continuous
Age, Continuous(years)Generic ImiquimodAldara™Vehicle CreamTotal
Mean66.5 ± 10.166.7 ± 10.466.7 ± 9.966.6 ± 10.1
Sex: Female, Male
Sex: Female, Male(Participants)Generic ImiquimodAldara™Vehicle CreamTotal
Female29201362
Male15215976387
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Generic ImiquimodAldara™Vehicle CreamTotal
Hispanic or Latino56213
Not Hispanic or Latino17617387436
Unknown or Not Reported0000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Generic ImiquimodAldara™Vehicle CreamTotal
American Indian or Alaska Native0000
Asian0000
Native Hawaiian or Other Pacific Islander0000
Black or African American0000
White18117989449
More than one race0000
Unknown or Not Reported0000
08

Study locations

20 sites
  • Burke Pharmaceutical Research
    Hot Springs, Arkansas 71913, United States
  • Associates in Research, Inc.
    Fresno, California 93720, United States
  • Skin Surgery Medical Group, Inc.
    San Diego, California 92117, United States
  • Cherry Creek Research, Inc.
    Denver, Colorado 80209, United States
  • FXM Research Corp.
    Miami, Florida 33175, United States
  • MedaPhase, Inc.
    Newnan, Georgia 30263, United States
  • Deaconess Clinic, Inc.
    Evansville, Indiana 47713, United States
  • Minnesota Clinical Study Center
    Fridley, Minnesota 55432, United States
  • Mt. Sinai School of Medicine
    New York, New York 10029, United States
  • Derm Research Center of New York, Inc.
    Stony Brook, New York 11790, United States
  • University Dermatology Consultants, Inc.
    Cincinnati, Ohio 45219, United States
  • Oregon Medical Research Center, P.C.
    Portland, Oregon 97223, United States
  • Rhode Island Hospital, Dermatopharmacology Division
    Providence, Rhode Island 02903, United States
  • Dermatology Associates of Knoxville, P.C.
    Knoxville, Tennessee 37917, United States
  • Tennessee Clinical Research Center
    Nashville, Tennessee 37215, United States
  • DermResearch, Inc.
    Austin, Texas 78759, United States
  • Suzanne Bruce & Associates, P.A.
    Houston, Texas 77056, United States
  • Dermatology Clinical Research Center of San Antonio
    San Antonio, Texas 78229, United States
  • Dermatology Research Center, Inc.
    Salt Lake City, Utah 84124, United States
  • Premier Clinical Research
    Spokane, Washington 99204, United States
09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of May 2008, a primary completion of Mar 2009 and a completion of Apr 2009. It does not say whether these dates are actual or estimated.

Results were first posted in Sep 2020, 11 years 6 months after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 28, 2009
First posted
Jul 29, 2009
Start
May 2008
Primary completionActual
Mar 2009
CompletionActual
Apr 2009
Results first posted
Sep 4, 2020
Last update
Sep 4, 2020
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 4, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00948428
Lead sponsor
Actavis Inc.
Responsible party
Sponsor
First posted
Jul 29, 2009
Start date
May 2008
Primary completion
Mar 2009
Completion
Apr 2009
Results posted
Sep 4, 2020
Last update
Sep 4, 2020

Study contacts

Christine M. Winslow, Ph.D.
study director · Actavis Mid-Atlantic LLC

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2020. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Imiquimod

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