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NKTR-181

Phase 3

Low Back Pain | Small molecule | Pain |Nektar Therapeutics|Trials Updated: Aug 2, 2021

NKTR-181 development status

Highest phase Phase 3
Registered trials 2 across 1 sponsor since Jun 2012

NKTR-181 target and mechanism

ModalitySmall molecule

Also known as NKTR-181 BID tablets

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials3
Total Enrollment2,123

FDA Designations

No designations recorded

NKTR-181 clinical trials

NKTR-181 · 3 trials · 3 indications

Phase 3 2Phase 2 1
NCT02367820Long-Term Safety and Tolerability Study of NKTR-181 in Subjects With Chronic Low Back Pain or Chronic Non-Cancer PainLow Back Pain
COMPLETED638 Analytics
NCT02362672Efficacy and Safety Study of NKTR-181 in Opioid-Naive Subjects With Low Back PainLow Back Pain
COMPLETED1,189 Analytics
PHASE3COMPLETED
Long-Term Safety and Tolerability Study of NKTR-181 in Subjects With Chronic Low Back Pain or Chronic Non-Cancer Pain
Low Back PainUnlock trial analytics
PHASE3COMPLETED
Efficacy and Safety Study of NKTR-181 in Opioid-Naive Subjects With Low Back Pain
Low Back PainUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants Reporting Adverse Events
Screening baseline through end of study, an average of 57 weeks

Count of subjects reporting treatment emergent adverse events

The Change in Weekly (ie, 7-day Average) Pain Score at the End of Double-blind, Randomized Treatment Period, Relative to the Weekly Score at the End of Titration (Double-blind Baseline)
12 Weeks of randomized double blinded period

The daily pain intensity is an 11-point numerical rating scale ranging from 0 (no pain) to 10 (worst possible pain).

The Mean Change From Baseline Pain Score to Pain Score at the End of the Double-blind Randomized Treatment Period.
Baseline and Visit 10 (day 69)

The first phase of this trial involved an open-label titration period where patients were given NKTR-181 at increasing doses up to a maximum of 400 mg twice daily until adequate pain control was achieved. Patients achieving adequate pain control were then progressed to the second phase of the trial where patients were randomized in a 1:1 ratio to receive either placebo or their tolerable dose level of NKTR-181. All efficacy data for NKTR-181 patients was combined into one group regardless of tolerable dose level. For this outcome, the subjects had to rate their worst pain intensity during the past 4 hours from 0 to 10 on an 11-point scale, where 0 represented one end of the continuum (i.e., no pain) and 10 represented the other extreme of pain intensity (i.e., worst pain imaginable).

Secondary Endpoints

Change From Baseline in Brief Pain Inventory (BPI) Pain Intensity Item to Week 52
Baseline, monthly change from baseline till the end of study
Change From Baseline in Brief Pain Inventory (BPI) Pain Interference Item to Week 52
Baseline, monthly change from baseline till the end of study
Responder Analysis Based on Percent Reduction in Pain Intensity
Screening Baseline through Week 12
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
NKTR-181EXPERIMENTALNKTR-181 twice daily (BID) tablets
PlaceboPLACEBO_COMPARATORPlacebo to match NKTR-181 twice daily (BID) tablets
100 mg NKTR-181EXPERIMENTAL100 mg of NKTR-181 in tablet form, BID. Dosing to occur at Titration period up to 30 days and at Randomization period up to 24 days.
200 mg NKTR-181EXPERIMENTAL200 mg of NKTR-181 in tablet form, BID. Dosing to occur at Titration period up to 30 days and at Randomization period up to 24 days.
300 mg NKTR-181EXPERIMENTAL300 mg of NKTR-181 in tablet form, BID. Dosing to occur at Titration period up to 30 days and at Randomization period up to 24 days
400 mg NKTR-181EXPERIMENTAL400 mg of NKTR-181 in tablet form, BID. Dosing to occur at Titration period up to 30 days and at Randomization period up to 24 days

Interventions

NameTypeDescription
NKTR-181 BID tabletsDRUGNKTR-181 tablets 100-600 mg twice daily (BID)
Placebo to match NKTR-181 BID tabletsDRUGPlacebo to match NKTR-181 tablets 100-400 mg twice daily (BID)
NKTR-181DRUG -
PlaceboDRUGPlacebo dosing will be only in the double-blind randomization arm and will be identical in form to the Experimental NKTR-181
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites56

Inclusion Criteria: * Male or non-pregnant, non-nursing female aged 18 to 75 years old * Clinical diagnosis of moderate to severe, chronic low back or non-cancer pain for at least three months * Not experiencing adequate pain relief or have failed previous treatment with non-opioid analgesics * Opi...

Countries:United States
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Competitive Landscape -Low Back Pain 12 trials

Top 1 of 5 competitors

CompanyTickerTrialsLead PhaseDrugs
Eli Lilly and CompanyLLY1PHASE2LY4065967
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Frequently asked questions about NKTR-181

What is NKTR-181 used for?

NKTR-181 is an investigational small molecule being developed for chronic pain, specifically chronic low back pain and osteoarthritis of the knee. It has been studied in Phase 3 clinical trials in patients with chronic low back pain and in a Phase 2 trial in patients with osteoarthritis of the knee.

Who is developing NKTR-181?

NKTR-181 is being developed by Nektar Therapeutics, which trades on the Nasdaq under the ticker NKTR. Nektar is the sponsor of the clinical development program for NKTR-181.

What phase is NKTR-181 in?

NKTR-181 has completed Phase 3 clinical development. Two Phase 3 trials and one Phase 2 trial have been completed. The Phase 3 program enrolled 1,827 patients in randomized, double-blind, placebo-controlled studies.

What clinical trials is NKTR-181 in?

NKTR-181 has been studied in three completed trials: NCT02367820, a Phase 3 long-term safety and tolerability study in chronic low back pain or chronic non-cancer pain; NCT02362672, a Phase 3 efficacy and safety study in opioid-naive subjects with low back pain; and NCT01619839, a Phase 2 study in chronic osteoarthritis of the knee pain.

Is NKTR-181 the same as NKTR-181 BID tablets?

Yes, NKTR-181 BID tablets is an alternative name for NKTR-181. Both refer to the same investigational small molecule developed by Nektar Therapeutics for chronic pain indications.