There are new safety concerns about the controversial prescription acne drug Accutane. In a study involving almost 14,000, mostly young patients taking the drug, elevations in blood cholesterol, triglycerides (a blood fat), and a blood liver function test were more common than have been previously reported.

Blood levels returned to normal or to pretreatment levels in the vast majority of patients in the months after they stopped taking Accutane, however.

Researchers say this finding is reassuring, but they add that patients should be followed longer to see if there are long-term implications for cardiovascular and liver disease risk.