Target product profiles for paediatric formulations of azithromycin and nitrofurantoin
Yasir Bin Nisar1, Giulia Brigadoi2, Shabina Ariff3
1Department of Sexual, Reproductive, Maternal, Child and Adolescent Health and Ageing, World Health Organization, Avenue Appia 20, 1211 Geneva 27, Switzerland.
Insights
Developing age-appropriate antibiotic formulations is crucial for children. New target product profiles for azithromycin and nitrofurantoin aim to improve treatment options for pediatric bacterial infections.
Area of Science:
- Pharmaceutical Sciences
- Pediatric Infectious Diseases
- Drug Formulation
Background:
- Bacterial infections remain a leading cause of mortality in children under five.
- A significant gap exists in age-appropriate antibiotic formulations, limiting effective treatment.
- Existing pediatric antibiotic options often have palatability issues or safety concerns regarding excipients.
Purpose of the Study:
- To develop Target Product Profiles (TPPs) for age-appropriate antibiotic formulations for azithromycin and nitrofurantoin.
- To guide pharmaceutical development and regulatory processes for pediatric antibiotic needs.
- To address the World Health Organization's (WHO) priority list for pediatric antibiotic formulations.
Main Methods:
- Utilized WHO's established methodologies to create TPPs for azithromycin and nitrofurantoin.
- Defined optimal and minimum requirements for dispersible and orodispersible formulations.
- Considered WHO-recommended pediatric dosage guidelines for nitrofurantoin.
Main Results:
- For azithromycin, optimal formulations include 100 mg dispersible tablets or 50 mg orodispersible multiparticulate systems; 50 mg dispersible tablets are the minimum.
- For nitrofurantoin, optimal formulations are orodispersible multiparticulate or scored dispersible tablets; dispersible tablets are the minimum.
- Recommended optimal nitrofurantoin unit doses of 5 mg and 10 mg for pediatric use, based on a 4 mg/kg/day dosage.
Conclusions:
- The developed TPPs provide clear targets for creating safer and more effective pediatric antibiotic formulations.
- These profiles will aid stakeholders in advancing the availability of child-appropriate azithromycin and nitrofurantoin.
- Improving formulation accessibility is key to enhancing pediatric healthcare and reducing mortality from bacterial infections.
Abstract:
Bacterial infections are still a main cause of death in children younger than 5 years, yet few age-appropriate antibiotic formulations exist, which limits treatment options and compromises quality of care. In 2023, the World Health Organization (WHO) published its first list of priority paediatric antibiotic formulations to guide research and development for age-appropriate antibiotic formulations. Both azithromycin and nitrofurantoin are on this list. Currently, no dispersible tablets are approved or available for these drugs and existing liquid forms are poorly palatable and/or contain excipients of safety concern. To support the development of age-appropriate formulations for these two antibiotics, we produced target product profiles using WHO's methods. For azithromycin, the optimum age-appropriate formulation and dose is scored 100 mg dispersible tablets or an orodispersible 50 mg multiparticulate formulation, with dispersible 50 mg tablets as the minimum requirement. For nitrofurantoin, the optimum age-appropriate formulation is an orodispersible multiparticulate formulation or scored dispersible tablets, with dispersible tablets as the minimum requirement. Based on the WHO recommended dosage of 4 mg/kg per day for children for nitrofurantoin, the optimum unit dose is 5 mg. If scoring is feasible, a 10 mg unit dose should be developed for dosing flexibility across paediatric age groups. These profiles aim to support regulatory authorities, pharmaceutical developers, health programmes and other stakeholders in advancing safer, effective and child-appropriate antibiotic formulations.
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