Drug companies Bayer Healthcare and Merck & Co. face yet another lawsuit over their popular antibiotic Avelox. The suit, filed by Stephanie Heller, alleges that Avelox left her with permanent nerve damage after taking the drug for just four days. Stephanie’s symptoms included pain, cramping, and weakness and tingling in her legs and extremities persisting for days, even after she had stopped taking Avelox. The suit claims that the drug makers were well aware of the dangers the antibiotic could cause after one of the first post-marketing studies was published in December of 2001. The study found that Avelox was associated with severe nerve damage—sometimes lasting more than a year.