If I'm taking Ketek, could I have trouble seeing clearly?

Ketek (telithromycin), an antibiotic prescribed for certain types of pneumonia, can interfere with eyesight. Some ways in which this drug affects vision include:
  • blurry vision
  • problems focusing
  • seeing double

These vision problems may begin after your first or second dose of Ketek. They usually last for only a few hours. During this time, you can deal with them by not quickly switching from looking at things nearby to looking at things far away. Call your doctor if you have any of these vision problems while taking Ketek.