The HSE says no patient received a potentially contaminated Chemotherapy product after it was recalled.
The body's moved to clarify reports suggesting the drug had been used this week - after the health service was notified of an issue with it.
The HSE says it became aware of the situation - last Monday - and that immediate and co-ordinated action was undertaken by all oncology teams throughout the country to contact all 200 patients concerned.
In a statement it says it would like to categorically refute claims to the contrary in some media coverage today.