How big is the tendon risk of levofloxacin. i play racquetball 5 days a week?

Veryy low: It is a very low risk, especially is you are taking a short course of levofloxacin. The risk is increased in children.

Unknown : There is an association between the quinolone medications (most commonly ciprofloxacin) and Achilles rupture but it is not understood why this happens. We do not have a way of knowing who is at increased risk in this setting. You can still participate in sports but be cautious at the first signs of any unusual pain in the Achilles area and modify activity and/or discontinue the drug if noted.