Ketek (telithromycin) is an antibiotic that fights bacteria. Ketek is used to treat mild to moderate pneumonia caused by certain types of bacteria. Your doctor may have suggested this medication for conditions for which the use would be off-label. This antibiotic may cause nausea, vomiting, mild diarrhea, headache, anxiety, or, in some cases, very serious liver disease. If you've suffered adverse effects from using this medication, an experienced attorney can help you recover damages. GetLegal.com's Attorney Directory can put you in touch with an attorney in your area who can offer the help you need.