NORTH CHICAGO, Ill. (AP) — Drugmaker Abbott Laboratories is recalling millions of containers of powder-based infant formula that might be contaminated with insect parts.

The voluntary action affects more than 5 million Similac-brand powder formulas sold in the U.S., Puerto Rico, Guam and some Caribbean countries.

Abbott said the products may contain a small beetle or larvae, which could cause stomach ache and digestion problems. The Food and Drug Administration has determined there was no “immediate health risk” from the contamination.

The affected products were sold in plastic containers and various can sizes, including 8-ounce, 12.4-ounce and 12.9-ounce.

The company has set up a consumer hot line at (800)986-8850. Consumers can enter the lot number on their containers to determine if they are subject to the recall. The products should be returned to Abbott for a full refund.

The company also has a site online to determine if the powder product is in the recall. Click here for that link.