According to Pfizer it is widening a recall of its best selling cholesterol-lowering drug Lipitor due to reports of moldy odors linked to the product. Pfizer says it is recalling 38,000 bottles of the drug.

The recall was initiated by two consumers who complained regarding the smell of Lipitor bottles, which are made by a third-party company in Puerto Rico.

This is the third time that Lipitor has recalled over the odor issue in lat three months. The company recalled 140,000 bottles in August and another 191,000 earlier in October as well.

Pfizer mentioned the cause of the odor was due to a chemical found on wooden pallets which are used to store and ship its product. The company says it’s working closely with the Puerto Rican manufacture regarding this odor issue.