Actor Dennis Quaid and his wife sued the makers of heparin Tuesday after their newborn twins were inadvertently given massive doses of the blood thinner at a hospital. The product liability lawsuit, filed in Chicago, seeks more than $50,000 in damages. It claims that Baxter Healthcare Corp., based in Deerfield, Ill., was negligent in packaging different doses of the product in similar vials with blue backgrounds. The lawsuit also says the company should have recalled the large-dosage vials after overdoses killed three children at an Indianapolis hospital last year.

The Quaids’ children, Thomas Boone and Zoe Grace, and a third patient were at Cedars-Sinai Medical Center on Nov. 18 when they were mistakenly given vials of heparin that were 1,000 times stronger than the usual dosage.

Cedars-Sinai said Tuesday the mistake occurred when two pharmacy technicians failed to verify the vials’ concentration before placing them in the pediatrics unit where the lower-concentration heparin is kept. The nurses who administered the drug also failed to check the dosage, the hospital said in a news release.