What antibiotic causes a tear in the achillies tendon?

Possibly Levaquin (levofloxacin) There have been reports of a very small percentage of people taking Levaquin (levofloxacin) who have developed tendonitis and Achilles tendon tears or rupture.
Fluoroquinolones. Fluoroquinolones are a group of antibiotics associated with tendon tears, especially Achilles tendon rupture.Common brand names include cipro, (ciprofloxacin) Avelox & levoquin. This risk increases in older people and in patients who are taking a corticosteroid such as prednisone. Achilles tendon rupture is more common in patients with arthritis and diabetes.