Aventis Pharma has recalled all batches of Synercid (quinupristin, dalfopristin) 500mg for intravenous infusion, as a precautionary measure. This is because the company has become aware of pressure changes in a small number of tested vials, related to the method of shipment from the manufacturing site in the US. Recipients are requested to quarantine stock and return it to their supplier for credit or replacement. Aventis Pharma should be contacted for further information (customer services, tel 0990 133347, medical information tel 0990 239604).