Cheshire pharmaceutical maker Alexion said it has issued a voluntary recall on some vials of its blood disease medication Soliris due to the presence of visible particles.
The company said the portion of the affected lot likely amounts to 2 percent or less of monthly consumption at hospitals. The affected lot was distributed in December.
Alexion workers observed the particles as part of routine testing of retained samples following vial filling, packaging and labeling by a third-party contract vialer that began working for Alexion last year. Alexion has stopped using the contractor and has switched to several others, it said.
The company said the supply of the drug to patients will not be interrupted.