Clinical Trials Register

Summary
EudraCT Number:	2020-001340-25
Sponsor's Protocol Code Number:	UMC-NMZ-EPHENE2020
National Competent Authority:	Netherlands - Competent Authority
Clinical Trial Type:	EEA CTA
Trial Status:	Completed
Date on which this record was first entered in the EudraCT database:	2020-07-17
Trial results

Index
A. PROTOCOL INFORMATION
B. SPONSOR INFORMATION
C. APPLICANT IDENTIFICATION
D. IMP IDENTIFICATION
D.8 INFORMATION ON PLACEBO
E. GENERAL INFORMATION ON THE TRIAL
F. POPULATION OF TRIAL SUBJECTS
G. INVESTIGATOR NETWORKS TO BE INVOLVED IN THE TRIAL
N. REVIEW BY THE COMPETENT AUTHORITY OR ETHICS COMMITTEE IN THE COUNTRY CONCERNED
P. END OF TRIAL

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A. Protocol Information

A.1

Member State Concerned

Netherlands - Competent Authority

A.2

EudraCT number

2020-001340-25

A.3

Full title of the trial

Enrichment randomized double-blind, placebo-controlled cross-over trial with PHEnytoin cream in patients with painful chronic idiopathic axonal polyNEuropathy

A.3.1

Title of the trial for lay people, in easily understood, i.e. non-technical, language

Clinical study with phenytoin cream for the treatment of painful chronic idiopathic axonal polyneuropathy

A.3.2

Name or abbreviated title of the trial where available

EPHENE study

A.4.1

Sponsor's protocol code number

UMC-NMZ-EPHENE2020

A.7

Trial is part of a Paediatric Investigation Plan

A.8

EMA Decision number of Paediatric Investigation Plan

B. Sponsor Information
B.Sponsor: 1
B.1.1	Name of Sponsor	University Medical Center Utrecht
B.1.3.4	Country	Netherlands
B.3.1 and B.3.2	Status of the sponsor	Non-Commercial
B.4 Source(s) of Monetary or Material Support for the clinical trial:
B.4.1	Name of organisation providing support	Prinses Beatrix Spier Fonds
B.4.2	Country	Netherlands
B.5 Contact point designated by the sponsor for further information on the trial
B.5.1	Name of organisation	University Medical Center Utrecht
B.5.2	Functional name of contact point	David Kopsky
B.5.3	Address:
B.5.3.1	Street Address	Heidelberglaan 100
B.5.3.2	Town/ city	Utrecht
B.5.3.3	Post code	3584 CX
B.5.3.4	Country	Netherlands
B.5.4	Telephone number	0031628671847
B.5.6	E-mail	info@neuropathie.nu

D. IMP Identification
D.IMP: 1
D.1.2 and D.1.3	IMP Role	Test
D.2	Status of the IMP to be used in the clinical trial
D.2.1	IMP to be used in the trial has a marketing authorisation	No
D.2.5	The IMP has been designated in this indication as an orphan drug in the Community	No
D.2.5.1	Orphan drug designation number
D.3 Description of the IMP
D.3.1	Product name	phenytoin 10% cream
D.3.4	Pharmaceutical form	Cream
D.3.4.1	Specific paediatric formulation	No
D.3.7	Routes of administration for this IMP	Cutaneous use
D.3.8 to D.3.10 IMP Identification Details (Active Substances)
D.3.8	INN - Proposed INN	Phenytoin 10% cream
D.3.9.1	CAS number	Zoekresultat
D.3.9.3	Other descriptive name	PHENYTOIN
D.3.9.4	EV Substance Code	SUB12211MIG
D.3.10	Strength
D.3.10.1	Concentration unit	% (W/W) percent weight/weight
D.3.10.2	Concentration type	equal
D.3.10.3	Concentration number	10
D.3.11 The IMP contains an:
D.3.11.1	Active substance of chemical origin	Yes
D.3.11.2	Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP)	No
	The IMP is a:
D.3.11.3	Advanced Therapy IMP (ATIMP)	No
D.3.11.3.1	Somatic cell therapy medicinal product	No
D.3.11.3.2	Gene therapy medical product	No
D.3.11.3.3	Tissue Engineered Product	No
D.3.11.3.4	Combination ATIMP (i.e. one involving a medical device)	No
D.3.11.3.5	Committee on Advanced therapies (CAT) has issued a classification for this product	No
D.3.11.4	Combination product that includes a device, but does not involve an Advanced Therapy	No
D.3.11.5	Radiopharmaceutical medicinal product	No
D.3.11.6	Immunological medicinal product (such as vaccine, allergen, immune serum)	No
D.3.11.7	Plasma derived medicinal product	No
D.3.11.8	Extractive medicinal product	No
D.3.11.9	Recombinant medicinal product	No
D.3.11.10	Medicinal product containing genetically modified organisms	No
D.3.11.11	Herbal medicinal product	No
D.3.11.12	Homeopathic medicinal product	No
D.3.11.13	Another type of medicinal product	No
D.IMP: 2
D.1.2 and D.1.3	IMP Role	Test
D.2	Status of the IMP to be used in the clinical trial
D.2.1	IMP to be used in the trial has a marketing authorisation	No
D.2.5	The IMP has been designated in this indication as an orphan drug in the Community	No
D.2.5.1	Orphan drug designation number
D.3 Description of the IMP
D.3.1	Product name	phenytoin 20% cream
D.3.4	Pharmaceutical form	Cream
D.3.4.1	Specific paediatric formulation	No
D.3.7	Routes of administration for this IMP	Cutaneous use
D.3.8 to D.3.10 IMP Identification Details (Active Substances)
D.3.8	INN - Proposed INN	Phenytoin 20% cream
D.3.9.1	CAS number	57-41-0
D.3.9.3	Other descriptive name	PHENYTOIN
D.3.9.4	EV Substance Code	SUB12211MIG
D.3.10	Strength
D.3.10.1	Concentration unit	% (W/W) percent weight/weight
D.3.10.2	Concentration type	equal
D.3.10.3	Concentration number	20
D.3.11 The IMP contains an:
D.3.11.1	Active substance of chemical origin	Yes
D.3.11.2	Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP)	No
	The IMP is a:
D.3.11.3	Advanced Therapy IMP (ATIMP)	No
D.3.11.3.1	Somatic cell therapy medicinal product	No
D.3.11.3.2	Gene therapy medical product	No
D.3.11.3.3	Tissue Engineered Product	No
D.3.11.3.4	Combination ATIMP (i.e. one involving a medical device)	No
D.3.11.3.5	Committee on Advanced therapies (CAT) has issued a classification for this product	No
D.3.11.4	Combination product that includes a device, but does not involve an Advanced Therapy	No
D.3.11.5	Radiopharmaceutical medicinal product	No
D.3.11.6	Immunological medicinal product (such as vaccine, allergen, immune serum)	No
D.3.11.7	Plasma derived medicinal product	No
D.3.11.8	Extractive medicinal product	No
D.3.11.9	Recombinant medicinal product	No
D.3.11.10	Medicinal product containing genetically modified organisms	No
D.3.11.11	Herbal medicinal product	No
D.3.11.12	Homeopathic medicinal product	No
D.3.11.13	Another type of medicinal product	No

D.8 Information on Placebo
D.8 Placebo: 1
D.8.1	Is a Placebo used in this Trial?	Yes
D.8.3	Pharmaceutical form of the placebo	Cream
D.8.4	Route of administration of the placebo	Cutaneous use

E. General Information on the Trial

E.1 Medical condition or disease under investigation

E.1.1

Medical condition(s) being investigated

Painful chronic idiopathic axonal polyneuropathy

E.1.1.1

Medical condition in easily understood language

Peripheral nerve pain without known cause

E.1.1.2

Therapeutic area

Diseases [C] - Nervous System Diseases [C10]

MedDRA Classification

E.1.2 Medical condition or disease under investigation

E.1.2	Version	21.1
E.1.2	Level	LLT
E.1.2	Classification code	10040040
E.1.2	Term	Sensory polyneuropathy axonal
E.1.2	System Organ Class	100000004852

E.1.3

Condition being studied is a rare disease

E.2 Objective of the trial

E.2.1

Main objective of the trial

The main objective is to evaluate the efficacy and safety of two concentrations of phenytoin cream (10% and 20%) in participants with neuropathic pain due to CIAP.

E.2.2

Secondary objectives of the trial

The second objective is to determine the predictive value of a double-blind placebo-controlled response test (DOBRET) to identify sustained responders.

E.2.3

Trial contains a sub-study

E.3

Principal inclusion criteria

• Age 40 years or older
• Patients have been diagnosed with CIAP defined as: presence of symmetrical distal sensory or sensorimotor symptoms such as numbness, pins and needles, tightness, coldness, unsteadiness, muscle cramps, and weakness with onset in the feet, compatible with polyneuropathy; presence of symmetrical distal sensory or sensorimotor signs with evidence of large nerve fiber involvement such as decreased sense of touch, vibration, and propriocepsis, usually in the presence of decreased pin prick/temperature sense, decreased/absent tendon reflexes, or slight muscle weakness on neurologic examination, compatible with polyneuropathy; an insidious onset and slow or no progression of the polyneuropathy over the course of at least 6 months; no identifiable cause for the polyneuropathy after thorough history-taking, clinical examination, and extensive laboratory testing; no suggestion of a hereditary polyneuropathy based on detailed kinship history (i.e., one or more affected family member), neurologic examination, or confirmation by genetic analysis; and nerve conduction studies excluding a demyelinating polyneuropathy and confirming large nerve fiber involvement if the findings on neurologic examination are equivocal considering the patient’s age.
• Presence of chronic localized neuropathic pain due to CIAP
• Neuropathic pain localized in two anatomically symmetrical areas of feet/lower legs
• Duration of neuropathic pain ≥3 months
• Duration of ≥1 hour neuropathic pain per day
• Neuropathic pain characteristics defined by a DN4 score ≥4
• Mean pain score of ≥4 and <10 on the NRS at study entry (baseline)
• Difference of pain intensity between left and right foot and/or lower leg of not more than 1 point on the NRS

E.4

Principal exclusion criteria

• Painful (poly)neuropathy other than CIAP
• Presence of neuropathic pain due to any other condition than CIAP
• Neuropathic pain (distribution, duration, characteristics, intensity) not fulfilling the inclusion criteria
• Pregnancy or planned pregnancy in the study period
• Use of oral phenytoin
• Open wounds in the neuropathic pain area
• Current use of topical analgesics
• Presence of other pain syndromes such as the widespread pain syndrome or pain in joints
• Presence of serious psychological/psychiatric morbidity
• Addiction to intoxicants
• Hypersensitivity to the study medication (active substance and excipients)
• Insufficient mastery of the Dutch language
• Cognitive impairment and insufficiently capable to understand the purpose of the study

E.5 End points

E.5.1

Primary end point(s)

The primary endpoint is the change in pain intensity from baseline NRS to the mean NRS in the second week in DOBRET positive participants.

E.5.1.1

Timepoint(s) of evaluation of this end point

At the end of the study

E.5.2

Secondary end point(s)

1) Change in pain intensity from baseline NRS to the mean NRS in the second week of each treatment period in DOBRET negative participants and all participants combined.
Furthermore, the following will be evaluated in DOBRET positive participants, DOBRET negative participants, and all participants combined:
2) Change from baseline to the end of the second week of each treatment period in quality of life as assessed with the EQ5-5D-5L, subscales of the BPI, pain characteristics as assessed with the NPSI, worst pain characteristics
3) Correlations between the following items: duration of painful CIAP, baseline NRS level, PCS, pain treatment naïve versus pain treatment resistant participants, worst pain characteristic, pain reducing effect on NRS, DOBRET results and PGIC
4) 30% and 50% improvement (MEC30 and MEC50) or more on the NRS compared to placebo within one patient
5) Time of carry-over effects after a treatment period
6) Number of participants who are responders on the PGIC after a treatment period
7) Onset of analgesic effect after application
8) Duration of analgesic effect
9) Daily number of cream applications
10) Percentage of analgesic effect as rated by the patient
11) Local and/or systemic side effects
12) Detection of phenytoin in plasma
13) Predictive value of DOBRET
14) Use of escape pain medication

E.5.2.1

Timepoint(s) of evaluation of this end point

2 weeks

E.6 and E.7 Scope of the trial

E.6

Scope of the trial

E.6.1

Diagnosis

E.6.2

Prophylaxis

E.6.3

Therapy

Yes

E.6.4

Safety

Yes

E.6.5

Efficacy

Yes

E.6.6

Pharmacokinetic

Yes

E.6.7

Pharmacodynamic

E.6.8

Bioequivalence

E.6.9

Dose response

Yes

E.6.10

Pharmacogenetic

E.6.11

Pharmacogenomic

E.6.12

Pharmacoeconomic

E.6.13

Others

E.7

Trial type and phase

E.7.1

Human pharmacology (Phase I)

E.7.1.1

First administration to humans

E.7.1.2

Bioequivalence study

E.7.1.3

Other

E.7.1.3.1

Other trial type description

E.7.2

Therapeutic exploratory (Phase II)

Yes

E.7.3

Therapeutic confirmatory (Phase III)

E.7.4

Therapeutic use (Phase IV)

E.8 Design of the trial

E.8.1

Controlled

Yes

E.8.1.1

Randomised

Yes

E.8.1.2

Open

E.8.1.3

Single blind

E.8.1.4

Double blind

Yes

E.8.1.5

Parallel group

E.8.1.6

Cross over

Yes

E.8.1.7

Other

E.8.2

Comparator of controlled trial

E.8.2.1

Other medicinal product(s)

E.8.2.2

Placebo

Yes

E.8.2.3

Other

E.8.2.4

Number of treatment arms in the trial

E.8.3

The trial involves single site in the Member State concerned

Yes

E.8.4

The trial involves multiple sites in the Member State concerned

E.8.5

The trial involves multiple Member States

E.8.6 Trial involving sites outside the EEA

E.8.6.1

Trial being conducted both within and outside the EEA

E.8.6.2

Trial being conducted completely outside of the EEA

E.8.7

Trial has a data monitoring committee

E.8.8

Definition of the end of the trial and justification where it is not the last visit of the last subject undergoing the trial

LVLS

E.8.9 Initial estimate of the duration of the trial

E.8.9.1

In the Member State concerned years

E.8.9.1

In the Member State concerned months

E.8.9.1

In the Member State concerned days

F. Population of Trial Subjects

F.1 Age Range

F.1.1

Trial has subjects under 18

F.1.1.1

In Utero

F.1.1.2

Preterm newborn infants (up to gestational age < 37 weeks)

F.1.1.3

Newborns (0-27 days)

F.1.1.4

Infants and toddlers (28 days-23 months)

F.1.1.5

Children (2-11years)

F.1.1.6

Adolescents (12-17 years)

F.1.2

Adults (18-64 years)

Yes

F.1.2.1

Number of subjects for this age range:

F.1.3

Elderly (>=65 years)

Yes

F.1.3.1

Number of subjects for this age range:

F.2 Gender

F.2.1

Female

Yes

F.2.2

Male

Yes

F.3 Group of trial subjects

F.3.1

Healthy volunteers

F.3.2

Patients

Yes

F.3.3

Specific vulnerable populations

F.3.3.1

Women of childbearing potential not using contraception

F.3.3.2

Women of child-bearing potential using contraception

F.3.3.3

Pregnant women

F.3.3.4

Nursing women

F.3.3.5

Emergency situation

F.3.3.6

Subjects incapable of giving consent personally

F.3.3.7

Others

F.4 Planned number of subjects to be included

F.4.1

In the member state

F.4.2

For a multinational trial

F.4.2.1

In the EEA

F.4.2.2

In the whole clinical trial

F.5

Plans for treatment or care after the subject has ended the participation in the trial (if it is different from the expected normal treatment of that condition)

After the trial participants can be invited to participate in another trial and participants can opt for standard care.

G. Investigator Networks to be involved in the Trial

N. Review by the Competent Authority or Ethics Committee in the country concerned

Competent Authority Decision

Authorised

Date of Competent Authority Decision

2020-07-17

Ethics Committee Opinion of the trial application

Favourable

Ethics Committee Opinion: Reason(s) for unfavourable opinion

Date of Ethics Committee Opinion

2020-07-15

P. End of Trial
P.	End of Trial Status	Completed
P.	Date of the global end of the trial	2023-06-15

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