The Food and Drug Administration is warning people not to purchase or use two types of eyedrops due to potential contamination.

The eyedrops, Dr. Berne’s MSM Drops 5% Solution and LightEyez MSM Eye Drops-Eye Repair, could possibly have bacterial or fungal contamination, according to the FDA. Dr. Berne’s products are distributed by Dr. Berne’s Whole Health Products; LightEyez’ products are distributed by LightEyez Limited.

Using contaminated eyedrops could result in serious vision-threatening infections.

Federal officials said sampling and testing of the products showed they contained microbes and were not sterile. Also, the analysis found they contained methylsulfonylmethane, or MSM, as an active ingredient and are unapproved drugs that are illegally marketed in the U.S.

“There are no legally marketed ophthalmic drugs that contain MSM as an active ingredient,” the FDA wrote in its warning.

No adverse reactions have been reported from the products in the recall, the FDA announcement said, but people who have used the drops and have signs or symptoms of an eye infection should talk to their healthcare provider. People who have the eyedrops should throw them away.

Both of the eyedrops were sold online.

The warning is just the latest in regard to contaminated eye drops.

Earlier this year, three eyedrops – EzriCare Artificial Tears, Delsam Pharma’s Artificial Tears and Delsam Pharma’s Artificial Eye Ointment – were recalled over concerns they were contaminated with drug-resistant bacteria.

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