# Safety of the preparation of monensin sodium (Coxidin®) produced with Streptomyces sp. LMG S‐19095 as a coccidiostat for chickens for fattening and chickens reared for laying (Huvepharma N.V.)

## TL;DR

The paper concludes that monensin sodium (Coxidin®) is safe for chickens at a reduced dose, but it can cause skin and respiratory sensitization.

## Contribution

The paper provides a revised safety assessment of monensin sodium for poultry and confirms environmental safety.

## Key findings

- Monensin sodium is safe for chickens at 120 mg/kg feed but is a skin and respiratory sensitiser.
- The additive poses no risk to the environment when used at the revised dose.
- Inhalation and dermal exposure remain a risk despite the formulation with calcium carbonate.

## Abstract

Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety of monensin sodium (Coxidin®) produced with Streptomyces sp. LMG S‐19095 as a coccidiostat for chickens for fattening, chickens reared for laying, turkeys for fattening and turkeys reared for breeding. In 2024, the EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) could not conclude on the safety of the additive for chickens for fattening and chickens reared for laying, nor on the potential of the formulation containing calcium carbonate to be irritant to skin and eyes and to be a skin sensitiser, and could not exclude a risk for the aquatic compartment when used in chickens for fattening. The applicant provided additional information to address the limitations regarding the safety of the additive and submitted a plan for the post marketing monitoring. During the assessment the applicant reduced the maximum recommended dose for the use of the additive in chickens for fattening and chickens reared for laying from 125 to 120 mg monensin sodium/kg complete feed. The Panel concludes that the use of monensin sodium from Coxidin® is safe up to the newly proposed maximum recommended level of 120 mg/kg complete feed for chickens for fattening and chickens reared for laying/breeding. Coxidin® formulated with calcium carbonate is not a skin irritant but should be considered as a skin and respiratory sensitiser. Inhalation and dermal exposure are considered a risk. No conclusions can be reached on its eye irritation potential. The use of monensin sodium from Coxidin® in complete feed for chickens for fattening and chickens reared for laying poses no risk for the environment. The proposal of the post‐market monitoring plan of the applicant is appropriate.