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Robert Cherry, 71, a patient who received a steroid shot at a clinic in Berlin, Md., about a month ago, went back Thursday morning after hearing it had received some of the tainted medicine.

“So far, I haven’t had any symptoms … but I just wanted to double check with them,” Cherry said. “They told me to check my temperature and if I have any symptoms, I should report straight to the emergency room, and that’s what I’ll do.”

The company that supplied the steroid in question is what is known as a compounding pharmacy. These pharmacies custom-mix solutions, creams and other medications in doses or in forms that generally aren’t commercially available.

Other compounding pharmacies have been blamed in recent years for serious and sometimes deadly outbreaks caused by contaminated medicines.

Two people were blinded in Washington, D.C., in 2005. Three died in Virginia in 2006 and three more in Oregon the following year. Twenty-one polo horses died in Florida in 2009. Earlier this year, 33 people in seven states developed fungal eye infections.

Compounding pharmacies are not regulated as closely as drug manufacturers, and their products are not subject to FDA approval.

A national shortage of many drugs has forced doctors to seek custom-made alternatives from compounding pharmacies.

The New England Compounding Center makes dozens of other medical products, state officials said. But neither the company nor health officials would identify them.

The company said in a statement Thursday that despite the FDA warning, “there is no indication of any potential issues with other products.” It called the deaths and illnesses tragic and added: “The thoughts and prayers of everyone employed by NECC are with those who have been affected.”

A 2011 state inspection of the Framingham facility gave the business a clean bill of health.

Associated Press writers Travis Loller in Nashville, Jay Lindsay in Boston, Randall Chase in Wilmington, Del., and AP chief medical writer Marilynn Marchione in Milwaukee contributed to this story.