Mylan Pharmaceuticals is recalling one lot of the anti-anxiety medication alprazolam, for what they say is “the potential presence of a foreign substance.”

Alprazolam is commonly sold under the brand name Xanax and manufacturers have issued a voluntary recall.

As of the time of this writing, Mylan has not given anymore details as to what the 'foreign substance' could be. Also, as of the recall date (Friday, October 25), there have been no reports of anyone falling ill from Xanax linked to this specific lot, according to fox2now.com.

When it comes to the likelihood of anyone being adversely affected, Mylan said:

“is expected to be rare, but the remote risk of infection to a patient cannot be ruled out.”

It's still kind of unsettling when the company won't give more specifics on the 'foreign substance.' To find out what you should do with the bottles from this recalled lot, refer to Mylan's announcement.