Antibiotic therapy vs. placebo in the treatment of acute uncomplicated appendicitis: a prospective randomized double-blind placebo-controlled trial - APPAC III

2025-520761-44-00 Therapeutic use (Phase IV) Authorised, recruitment pending

Status Authorised, recruitment pending · 1 EU/EEA countries · 5 sites

Overview

Sponsor-declared trial summary

Phase Therapeutic use (Phase IV)
Status Authorised, recruitment pending
Participants planned 72
Countries 1
Sites 5

Uncomplicated acute appendicitis

The aim of the study is to compare antibiotic therapy with placebo in the treatment of uncomplicated acute appendicitis to evaluate the role of antibiotic therapy in the resolution of acute uncomplicated appendicitis.

Key facts

Sponsor
Turku University Hospital
Participant type
Patients
Age range
18-64 years
Gender
Male and Female
Therapeutic area
Diseases [C] - Digestive System Diseases [C06]
Decision date (initial)
2025-01-29
Transition trial
Yes
Low-intervention
No
Rare-disease indication
No
Vulnerable population
No

External identifiers

EU CT number
2025-520761-44-00
EudraCT number
2015-003634-26
ClinicalTrials.gov
NCT03234296

Trial design

CTIS Part I — objectives, methods, condition coding

Main objective

Scope: Safety, Therapy, Efficacy

The aim of the study is to compare antibiotic therapy with placebo in the treatment of uncomplicated acute appendicitis to evaluate the role of antibiotic therapy in the resolution of acute
uncomplicated appendicitis.

Conditions and MedDRA coding

Uncomplicated acute appendicitis

Regulatory references

Plan to share IPD
No
EU CT numberTitleSponsor
2024-518984-36-00 Optimizing the antibiotic treatment of uncomplicated acute appendicitis: a prospective randomized multicenter study Turku University Hospital
2024-519339-40-00 Antibiotic therapy vs. placebo in the treatment of acute uncomplicated appendicitis: a prospective randomized double-blind placebo-controlled trial - APPAC III Turku University Hospital
2023-506213-21-00 Oral Antibiotic Outpatient Therapy vs. Placebo in the Treatment of Uncomplicated Acute Appendicitis: a Randomized Double-blind Placebo-controlled Noninferiority Trial APPAC IV Turku University Hospital
2024-519392-26-00 Acute appendicitis and microbiota – etiology and effects of the antimicrobial treatment - MAPPAC Turku University Hospital

Eligibility criteria

Principal inclusion / exclusion criteria as submitted by sponsor

Inclusion criteria 1

  1. 1) Signed informed consent, 2) Age 18 – 60 years, 3) CT scan confirmed diagnosis of uncomplicated acute appendicitis.

Exclusion criteria 1

  1. 1) Age <18 or > 60 years, 2) Pregnancy or lactating, 3) Allergy to contrast media or iodine, 4) Renal insufficiency, 5) Allergy or contraindication to antibiotic therapy 6) Metformine medication, 7) Severe systemic illness (for example malignancy, medical condition requiring immunosuppressant medications), 8) Complicated acute appendicitis in a CT scan (appendicolith, perforation, abscess, suspicion of a tumor), 9) Inability to co-operate and give informed consent.

Endpoints

Primary and secondary outcome measures (English text)

Primary endpoints 1

  1. The primary endpoint is the success of the randomized treatment (treatment efficacy). The treatment success is defined as the resolution of acute appendicitis with study treatment resulting in discharge from the hospital without the need for surgical intervention and treatment efficacy evaluated at ten days after initiation of the randomized treatment.

Secondary endpoints 1

  1. Secondary endpoints include post-intervention complications (Clavien-Dindo classification), late recurrence of acute appendicitis after study treatment defined as clear clinical suspicion of acute appendicitis evaluated at follow-up of one, three, five and ten years, duration of hospital stay, VAS scores, quality of life (QOL, 15D), sick leave and treatment costs.

Investigational products

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

Test 3

Levofloxacin

SUB08471MIG · Substance

Active substance
Levofloxacin
Pharmaceutical form
TABLET
Route of administration
ORAL
Max daily dose
500 mg milligram(s)
Max total dose
2000 mg milligram(s)
Max treatment duration
4 Day(s)
Authorisation status
Authorised
ATC code
- — -
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Ertapenem

SUB25388 · Substance

Active substance
Ertapenem
Pharmaceutical form
SOLUTION FOR INFUSION
Route of administration
IV INFUSION
Max daily dose
1 g gram(s)
Max total dose
3 g gram(s)
Max treatment duration
3 Day(s)
Authorisation status
Authorised
ATC code
- — -
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Metronidazole

SUB08922MIG · Substance

Active substance
Metronidazole
Pharmaceutical form
TABLET
Route of administration
ORAL
Max daily dose
1500 mg milligram(s)
Max total dose
6000 mg milligram(s)
Max treatment duration
4 Day(s)
Authorisation status
Authorised
ATC code
- — -
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Placebo 1

The placebo used in the study was manufactured by the hospital pharmacy. Both the investigational drugs and the placebo were packaged in identical containers by the hospital pharmacy to ensure blinding.

N/A · Product

Other product name
N/A
Pharmaceutical form
N/A
ATC code
N/A — N/A
Marketing authorisation
N/A
MA holder
N/A
MA country
Iceland
Paediatric formulation
No

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Turku University Hospital

15 Total trials 6 Recruiting
Academic / Non-commercial
Sponsor organisation
Turku University Hospital
Address
Kiinamyllynkatu 4-8
City
Turku
Postcode
20520
Country
Finland

Scientific contact point

Organisation
Turku University Hospital
Contact name
Paulina Salminen

Public contact point

Organisation
Turku University Hospital
Contact name
Paulina Salminen

Locations

1 EU/EEA country · 5 investigational sites

By country

CountryMS statusPlanned subjectsSites
Finland Authorised, recruitment pending 72 5
Rest of world 0

Investigational sites

Finland

5 sites · Authorised, recruitment pending
Turku University Hospital
Surgery, Kiinamyllynkatu 4-8, 20520, Turku
Kuopio University Hospital
Surgery, Puijonlaaksontie 2, P. O. Box 1777, Kuopio
Oulu University Hospital
Surgery, Kajaanintie 50, 90220, Oulu
HUS-Yhtymae
Surgery, Kasarmikatu 11-13, 00130, Helsinki
Tampere University Hospital
Surgery, Kalevantie 4, 33100, Tampere

Results and documents

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

Documents 4 files

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

TypeTitleVersion
Protocol (for publication) APPAC III Study plan final 1
Recruitment arrangements (for publication) Suostumusprosessin kuvaus APPAC III 1
Subject information and informed consent form (for publication) APPAC III Potilastiedote ja -suostumus Tukija 6 9 2016 final 1
Subject information and informed consent form (for publication) APPAC III Potilastiedote ja -suostumus Tukija 6 9 2016 pa svenska 1

Application history

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

#TypeCodeSubmittedReference MSConclusionDecision date
1 INITIAL IN 2025-01-21 Finland Acceptable
2025-01-29
2025-01-29