NCT04070469

Plasma Concentrations of Amoxicillin Administered in High-doses During the First Week of Treatment (MAX-AMOX)

Plasma Concentrations of Amoxicillin Administered in High-doses During the First Week of Treatment : Intra- and Inter-individual Variability, Factors Associated With Overdose and Adverse Events

• Status: Completed
• Phase: Phase 4
• Study type: Interventional
• Enrollment: 142 (actual)
• Sponsor: University Hospital, Clermont-Ferrand · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Amoxicillin is the most prescribed antibiotic in France. High dose intravenous amoxicillin, (dosage greater than or equal to 150 mg / kg / day or 12 g per day for patients over 80 kg) is used in the treatment, in particular, of infectious streptococcal endocarditis. oral, streptococci gallolyticus and enterococci, infections of the central nervous system with sensitive germs including Streptococcus pneumoniae and Listeria monocytogenes, osteo articular infections. The dose-related adverse effects of this antibiotic are nephrological (crystalluria may lead to acute renal failure) and neurologic. Recently, the number of amoxicillin crystalluria reported to pharmacovigilance centers has increased, having led the National Agency of drug and health products safety (ANSM) to recommend the determination of the residual level of amoxicillin during the first week of treatment of these patients. Nevertheless, there is no precise therapeutic target in patients treated with high dose amoxicillin except in the context of critical care. The authors suggest the interest of a target between 4 and 10 times the minimum inhibitory concentration (MIC) based on in vitro efficacy studies, and retrospective observations of toxicity cases.

Detailed description

Patients will be followed for 8 days. After inclusion, (day of the introduction of high-dose amoxicillin treatment), the residual amoxicillin plasma concentrations will be determined at Day1, Day4 +/- 1 day and Day7 +/- 1 day of the start of treatment. A urine collection will be performed the same day to search for crystalluria and measure the pH and urinary density. In case of KDIGO (Kidney Disease Improving Global Outcomes) 2 or 3 stage renal failure or neurological signs compatible with overdose, residual amoxicillin and crystalluria and urinary density and urinary pH will be measured during the day of discovery of renal failure. In the case of KDIGO stage 1 kidney failure, a residual level of amoxicillin and a crystalluria search and the measurement of urinary density and urinary pH will be carried out the following day, when serum creatinine is checked according to usual practices. At day 7 the clinical and infectious biological evolution of the patient will be collected.

Conditions

• Infection, Bacterial

Interventions

Type	Name	Description
DRUG	Amoxicillin	dosage of plasma concentration of amoxicillin

Timeline

• Start date: 2019-12-04
• Primary completion: 2024-12-19
• Completion: 2024-12-19
• First posted: 2019-08-28
• Last updated: 2025-01-10

Locations

1 site across 1 country: France