ClinicalTrials.gg
CompletedNCT00263575Updated Jun 18, 2024Results posted

Long-term Safety Study of Sublingual Fentanyl Tablets in Cancer Patients

A Phase 3 interventional study of EN3267 in Pain and Cancer, sponsored by Kyowa Kirin Co., Ltd.. Completed at 1 site in United States. Open to participants aged 17 Years and older. Per ClinicalTrials.gov, last updated 2024-06-18.

Primary conditionBreakthrough PainRegistry: PainReclassifiedWhy we changed it
Registry
Pain — the first condition term the registry derived for this study.
ClinicalTrials.gg
Breakthrough Pain
Why
  1. The study's title name Breakthrough Pain, a narrower term within Pain.
Confidence
High: the new condition is named in the study's own title. Of 46 hand-checked studies reclassified this way, 72% were exactly right and 89% in the right disease family; the registry's first term was right for 4% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Kyowa Kirin Co., Ltd. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
139
Allocation
Not applicable
Ages
17 Years and older
Sex
All
01

Study summary

The purpose of this study is to evaluate the long-term safety and effectiveness of EN3267 in treating breakthrough pain episodes in opioid cancer patients who are using stable doses of opioid medication.

Read the detailed description

This was a Phase 3 non-randomized, open-label, multicentre study designed to evaluate the long-term safety of EN3267 in the treatment of BTcP in opioid-tolerant cancer patients. The study was conducted in 2 parts:

  1. A Titration Period during which patients had up to 2 weeks to determine a single, effective dose of study medication (EN3267) for adequate treatment of BTcP, and
  2. A maintenance Period of up to 12 months in which episodes of BTcP were treated with study medication.
02

Conditions studied

  • Pain
  • Cancer

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Keywords

  • EN3267
  • Breakthrough Pain
  • Safety Study
  • Fentanyl Tablets
03

In context

Breakthrough Pain Reclassified

34 studies on the registry are indexed under Breakthrough Pain; 4 are open to participants now.

This study's enrollment of 139 is above the median of 91 across 21 interventional studies indexed under Breakthrough Pain.

Browse Breakthrough Pain studies →

Lead sponsor

Kyowa Kirin Co., Ltd. is the lead sponsor of 159 studies on the registry; 8 are open to participants now.

Compared within Breakthrough Pain, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Pain. The counts are of registry records indexed under each term, refreshed daily. How we classify →

04

Who can participate

Ages eligible
17 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

  • Males or females 17 years of age or older.
  • Stable cancer-related pain.
  • Are receiving a stable, fixed-schedule oral opioid regimen equivalent to 60 to 1000 mg of oral morphine per day or transdermal fentanyl therapy equivalent to 50 to 300 µg/h, and are on a stable dose of opioid medication for relief of breakthrough pain.
  • Experiencing 1-4 episodes of breakthrough pain per day.
  • Meet the criteria defined in the (ECOG) Performance Status for Grade 0, 1, or 2.

Exclusion criteria

Exclusion Criteria:

  • Have previously been exposed to EN3267.
  • Are pregnant or lactating.
  • Have uncontrolled or rapidly escalating pain.
  • Have any condition that would, in the investigator's opinion, preclude participation in the study or compromise data collection. These conditions may include cardiopulmonary disease, and/or neurologic/psychologic conditions.
  • Are scheduled to take MAOIs (monoamine oxidase inhibitors) during the study.
  • Are scheduled to receive anti-neoplastic therapy that, in the investigator's opinion, will influence assessment of breakthrough pain.
  • Are scheduled to receive an drug other than EN3267 during the course of the study.
  • Have , allergy or to fentanyl.
  • Have significant prior history of substance abuse or alcohol abuse.
  • Would have difficulty complying with the protocol, as assessed by the investigator.
  • Are unable to read, write, or comprehend the English language in order to complete diaries.
Terms in these criteria, in plain language(5)

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.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

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.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
139 participants (actual)

Study arms

  • Experimental
    sublingual fentanyl tablet

    Drug: EN3267

Interventions

  • DrugEN3267

    EN3267 will be available in 100, 200, 300, 400, 600 (two 300 ug tablets), and 800 ug (two 400 ug tablets) doses

    Also known as: Fentanyl

06

What researchers measure

Primary outcomes

  1. Evaluate the Long-term Safety and Effectiveness of EN3267

    Time frame: screening, 2 week titration period and 12 monthly study visits

07

Results

Posted Nov 19, 2020

Participant flow

Recruitment period was first patient screened in December 2005 to last patient screened in November 2008. Patients were recruited from Medical Institutions in the US.

Titration Period
Participant flow — Titration Period
MilestoneSublingual Fentanyl Tablet
Started139
Completed96
Not completed43
Withdrew: Adverse event14
Withdrew: Withdrawal by subject10
Withdrew: Protocol violation9
Withdrew: Sponsor decision2
Withdrew: Other2
Withdrew: Lack of efficacy6
Maintence Period
Participant flow — Maintence Period
MilestoneSublingual Fentanyl Tablet
Started96
Completed19
Not completed77
Withdrew: Adverse event23
Withdrew: Withdrawal by subject8
Withdrew: Protocol violation4
Withdrew: Lack of efficacy4
Withdrew: Physician decision6
Withdrew: Lost to follow-up1
Withdrew: Sponsor decision24
Withdrew: Other7

Outcome measures

PrimaryEvaluate the Long-term Safety and Effectiveness of EN3267
Time frame:
screening, 2 week titration period and 12 monthly study visits
Reported as:
Number · participants
Evaluate the Long-term Safety and Effectiveness of EN3267
participantsTitrationMaintenanceOverall
Patients with at least 1 AE6487116
Patients with at least 1 AE causing discontinue142337
Patients with at least 1 SAE74046
Patients with an AE resulting in death41519

Adverse events

Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Sublingual Fentanyl Tablet—46/139 (33.1%)116/139 (83.5%)
Most frequent serious events
Showing 10 of 66
Most frequent serious events
EventSublingual Fentanyl Tablet
deathGeneral disorders19/139
DehydrationMetabolism and nutrition disorders6/139
Prostate cancer metastaticNeoplasms benign, malignant and unspecified (incl cysts and polyps)5/139
AnemiaBlood and lymphatic system disorders3/139
Febrile neutropeniaBlood and lymphatic system disorders3/139
PainGeneral disorders3/139
Breast cancer metastaticNeoplasms benign, malignant and unspecified (incl cysts and polyps)2/139
Colon cancer metastaticNeoplasms benign, malignant and unspecified (incl cysts and polyps)2/139
Lung cancer metastaticNeoplasms benign, malignant and unspecified (incl cysts and polyps)2/139
Metastatic carcinoma of the bladderNeoplasms benign, malignant and unspecified (incl cysts and polyps)2/139
Most frequent other events
Showing 10 of 27
Most frequent other events
EventSublingual Fentanyl Tablet
NauseaGastrointestinal disorders32/139
FatigueGeneral disorders21/139
VomitingGastrointestinal disorders18/139
DehydrationMetabolism and nutrition disorders16/139
Edema peripheralGeneral disorders15/139
ArthralgiaMusculoskeletal and connective tissue disorders14/139
Back painMusculoskeletal and connective tissue disorders13/139
InsomniaPsychiatric disorders13/139
ConstipationGastrointestinal disorders12/139
AstheniaGeneral disorders12/139

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Sublingual Fentanyl Tablet
<=18 years0
Between 18 and 65 years106
>=65 years33
Age, Continuous
Age, Continuous(years)Sublingual Fentanyl Tablet
Mean57 ± 11.6
Sex: Female, Male
Sex: Female, Male(Participants)Sublingual Fentanyl Tablet
Female76
Male63
Region of Enrollment
Region of Enrollment(participants)Sublingual Fentanyl Tablet
United States139
08

Study locations

1 site
  • Carolinas Pain Institute
    Winston-Salem, North Carolina 27103, United States
09

References and documents

Publications

  • Nalamachu S, Hassman D, Wallace MS, Dumble S, Derrick R, Howell J. Long-term effectiveness and tolerability of sublingual fentanyl orally disintegrating tablet for the treatment of breakthrough cancer pain. Curr Med Res Opin. 2011 Mar;27(3):519-30. doi: 10.1185/03007995.2010.545380. Epub 2011 Jan 6. PubMed 21208151 ↗
10

Timeline

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

The record gives a start of Dec 2005, a primary completion of Dec 2008 and a completion of Jan 2009. It does not say whether these dates are actual or estimated.

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

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

Registered
Dec 7, 2005
First posted
Dec 9, 2005
Start
Dec 2005
Primary completionActual
Dec 2008
CompletionActual
Jan 2009
Results first posted
Nov 19, 2020
Last update
Jun 18, 2024
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 Jun 18, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00263575
Responsible party
Sponsor
First posted
Dec 9, 2005
Start date
Dec 2005
Primary completion
Dec 2008
Completion
Jan 2009
Results posted
Nov 19, 2020
Last update
Jun 18, 2024

Study contacts

Julian Howell
study director · Kyowa Kirin Co., Ltd.

Oversight

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

Not currently enrolling

This study is completed, as verified in Jun 2024. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: Fentanyl

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