Multicenter clinical trial on the effectiveness and safety of outpatient treatment of acute uncomplicated diverticulitis without antibiotics versus antibiotic treatment. ADIANA Trial.

2025-523121-17-00 Protocol IMIB-ADI-2025-01 Therapeutic use (Phase IV) Authorised, recruitment pending

Status Authorised, recruitment pending · 1 EU/EEA countries · 5 sites · Protocol IMIB-ADI-2025-01

Overview

Sponsor-declared trial summary

Phase Therapeutic use (Phase IV)
Status Authorised, recruitment pending
Participants planned 282
Countries 1
Sites 5

Diverticular disease of the intestine,

To evaluate the effectiveness and safety of outpatient treatment without antibiotics compared to outpatient treatment with antibiotics in patients with uncomplicated acute diverticulitis.

Key facts

Sponsor
Fundacion Para La Formacion E Investigacion Sanitaria De La Region De Murcia
Participant type
Patients
Age range
18-64 years, 65+ years
Gender
Male and Female
Therapeutic area
Diseases [C] - Digestive System Diseases [C06]
Decision date (initial)
2026-04-30
Transition trial
No
Low-intervention
Yes
Rare-disease indication
No
Vulnerable population
No

Trial design

CTIS Part I — objectives, methods, condition coding

Main objective

Scope: Safety, Efficacy

To evaluate the effectiveness and safety of outpatient treatment without antibiotics compared to outpatient treatment with antibiotics in patients with uncomplicated acute diverticulitis.

Secondary objectives 3

  1. Evaluate and compare the results in terms of cure, recurrence, and cost-effectiveness between outpatient treatment with and without antibiotics.
  2. To study the risk factors for diverticulitis and the prognostic factors (demographic and clinical characteristics and findings in complementary tests) that predict therapeutic failure and progression to CAD, in general and in each treatment group (outpatient treatment with or without antibiotics).
  3. Assess the quality of life of these patients after the acute episode and their degree of satisfaction with the treatment received.

Conditions and MedDRA coding

Diverticular disease of the intestine,

VersionLevelCodeTermSystem organ class
20.0 LLT 10013534 Diverticular disease 10017947

Eligibility criteria

Principal inclusion / exclusion criteria as submitted by sponsor

Inclusion criteria 4

  1. Patients over 18 years of age with a clinical and radiological diagnosis of uncomplicated acute diverticulitis of the sigmoid colon or descending colon (left-sided AD).
  2. Radiological diagnosis of acute uncomplicated diverticulitis by CT scan (modified Hinchey classification 0-Ia).
  3. First episode or previous history of AD (both complicated and uncomplicated, and ≥6 months having elapsed since the last episode to the current clinic visit).
  4. Signing of the informed consent form to participate in the study

Exclusion criteria 8

  1. Age >70 years old
  2. Patients who are candidates for hospitalization and/or intravenous antibiotic therapy (at diagnosis): Repeated vomiting or oral intolerance, need for intravenous fluid therapy and/or close monitoring, temperature >38°C, deterioration of general condition, and/or clinical suspicion of sepsis.
  3. Significant or decompensated comorbidity (ASA classification IV).
  4. Immunocompromised patients: Hematological causes, HIV with low CD4+ levels, immunosuppressive treatment, prolonged treatment with corticosteroids, chemotherapy, transplant or splenectomy patients, predisposing genetic disorders (severe combined immunodeficiency, etc.).
  5. Oral or intravenous antibiotic therapy in the 2 weeks prior to the onset of symptoms, for another cause.
  6. Pregnancy
  7. Inflammatory bowel disease (Crohn's disease, ulcerative colitis).
  8. Lack of social support that makes outpatient treatment impossible.

Endpoints

Primary and secondary outcome measures (English text)

Primary endpoints 1

  1. Therapeutic failure rate (early, within ≤48 hours, and at one month) for both treatments (with and without antibiotics).

Secondary endpoints 4

  1. Results in terms of recurrence (number, type, and time to onset).
  2. Time (days) until clinical recovery and return to daily social and work life.
  3. Risk factors for the development of diverticulitis and prognostic factors predictive of therapeutic failure and unfavorable progression to complicated acute diverticulitis, in general and according to treatment group
  4. Quality of life and level of satisfaction with the care received in both groups

Investigational products

Investigational medicinal products (IMPs), comparators, placebo, auxiliary

Test 6

cefuroxima cinfa 250 mg comprimidos recubiertos con película EFG

PRD11947964 · Product

Active substance
Cefuroxime
Pharmaceutical form
FILM-COATED TABLET
Route of administration
ORAL
Max daily dose
500 mg milligram(s)
Max total dose
3500 mg milligram(s)
Max treatment duration
7 Day(s)
Authorisation status
Authorised
ATC code
J01DC02 — -
Marketing authorisation
72258
MA holder
LABORATORIOS CINFA S.A.
MA country
Spain
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

MEIACT 200 mg comprimidos recubiertos con película

PRD13177686 · Product

Active substance
Cefditoren Pivoxil
Pharmaceutical form
FILM-COATED TABLET
Route of administration
ORAL
Max daily dose
400 mg milligram(s)
Max total dose
2800 mg milligram(s)
Max treatment duration
7 Day(s)
Authorisation status
Authorised
ATC code
J01DD16 — -
Marketing authorisation
65.943
MA holder
MEIJI PHARMA SPAIN, S.A.
MA country
Spain
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

ciprofloxacino cinfa 500 mg comprimidos recubiertos EFG

PRD11927985 · Product

Active substance
Ciprofloxacin
Pharmaceutical form
COATED TABLET
Route of administration
ORAL
Max daily dose
1000 mg milligram(s)
Max total dose
7000 mg milligram(s)
Max treatment duration
7 Day(s)
Authorisation status
Authorised
ATC code
J01MA02 — CIPROFLOXACIN
Marketing authorisation
62.765
MA holder
LABORATORIOS CINFA S.A.
MA country
Spain
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

amoxicilina/ácido clavulánico cinfa 875 mg/125 mg comprimidos recubiertos con película EFG

PRD11943488 · Product

Active substance
Amoxicillin
Pharmaceutical form
FILM-COATED TABLET
Route of administration
ORAL
Max daily dose
2625 mg milligram(s)
Max total dose
26250 mg milligram(s)
Max treatment duration
10 Day(s)
Authorisation status
Authorised
ATC code
J01CR02 — AMOXICILLIN AND ENZYME INHIBITOR
Marketing authorisation
67.892
MA holder
LABORATORIOS CINFA S.A.
MA country
Spain
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

ciprofloxacino cinfa 750 mg comprimidos recubiertos EFG

PRD542764 · Product

Active substance
Ciprofloxacin
Pharmaceutical form
COATED TABLET
Route of administration
ORAL
Max daily dose
2250 mg milligram(s)
Max total dose
15750 mg milligram(s)
Max treatment duration
7 Day(s)
Authorisation status
Authorised
ATC code
J01MA02 — CIPROFLOXACIN
Marketing authorisation
62.766
MA holder
LABORATORIOS CINFA S.A.
MA country
Spain
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Metronidazol Normon 250 mg comprimidos EFG

PRD11939207 · Product

Active substance
Metronidazole
Pharmaceutical form
TABLET
Route of administration
ORAL
Max daily dose
500 mg milligram(s)
Max total dose
3500 mg milligram(s)
Max treatment duration
7 Day(s)
Authorisation status
Authorised
ATC code
P01AB01 — METRONIDAZOLE
Marketing authorisation
62.223
MA holder
LABORATORIOS NORMON, S.A.
MA country
Spain
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Fundacion Para La Formacion E Investigacion Sanitaria De La Region De Murcia

Sponsor organisation
Fundacion Para La Formacion E Investigacion Sanitaria De La Region De Murcia
Address
Carretera Madrid-Cartagena S/N, El Palmar El Palmar
City
Murcia
Postcode
30120
Country
Spain

Scientific contact point

Organisation
Fundacion Para La Formacion E Investigacion Sanitaria De La Region De Murcia
Contact name
María Muñoz García

Public contact point

Organisation
Fundacion Para La Formacion E Investigacion Sanitaria De La Region De Murcia
Contact name
María Muñoz García

Locations

1 EU/EEA country · 5 investigational sites

By country

CountryMS statusPlanned subjectsSites
Spain Authorised, recruitment pending 282 5
Rest of world 0

Investigational sites

Spain

5 sites · Authorised, recruitment pending
Hospital General Universitario Morales Meseguer
general surgery and digestive system, Avenida Del Marques De Los Velez S/n, 30008, Murcia
Hospital Universitario De Getafe
general surgery and digestive system, Carretera De Madrid Toledo Km 12,500, 28905, Getafe
Hospital General Universitario De Elche
general surgery and digestive system, Edificio 2, Camino De La Almazara 11, Elche
University Clinical Hospital Virgen De La Arrixaca
general surgery and digestive system, Carretera Madrid-Cartagena S/N, El Palmar, Murcia
Hospital Obispo Polanco
General and Digestive Surgery, Avenida De Ruiz Jarabo S/n, 44002, Teruel

Results and documents

Annex IV summary of results, Annex V layperson summary, and all documents registered in CTIS for this trial

Documents 10 files

Public protocol annexes, IB summaries, regulatory submissions and post-authorisation documents registered in CTIS.

TypeTitleVersion
Protocol (for publication) D1_Protocol 2025-523121-17-00 2
Recruitment arrangements (for publication) K1_ Recruitment arrangements 1
Subject information and informed consent form (for publication) L1_SIS and ICF 1
Summary of Product Characteristics (SmPC) (for publication) E2_SmPC amoxicilina_acido clavulanico 1
Summary of Product Characteristics (SmPC) (for publication) E2_SmPC Ciprofloxacino 1
Summary of Product Characteristics (SmPC) (for publication) E2_SmPC Ciprofloxacino 1
Summary of Product Characteristics (SmPC) (for publication) E2_SmPC MEIACT 1
Summary of Product Characteristics (SmPC) (for publication) E2_SmPC Metronidazol 1
Synopsis of the protocol (for publication) D1_Protocol synopsis EN 2025-523121-17-00 2
Synopsis of the protocol (for publication) D1_Protocol synopsis ES 2025-523121-17-00 2

Application history

2 submissions — initial application plus substantial / non-substantial modifications

#TypeCodeSubmittedReference MSConclusionDecision date
1 INITIAL IN 2025-12-23 Spain Acceptable
2026-04-27
2026-04-30
2 SUBSTANTIAL MODIFICATION SM-1 2026-05-19 Spain Acceptable 2026-05-29