Levaquin Side Effects: I took Levaquin for 20 days for a sinus infection. It wasn't unt http://www.medications.com/effect/view/39787 I took Levaquin for 20 days for a sinus infection. It wasn't until that last day that my right knee was in tremendous pain; I couldn't straighten it out or really move it. It's been almost 2 weeks since I stopped the Levaquin and my right knee is still pa you need to call your MD! Tue, 10 Mar 2009 20:44:24 -0400 http://www.medications.com/effect/view/39787?item=17864 you need to call your MD! http://www.medications.com/effect/view/39787?item=17864 Yeah, he will tell you it's all in your head and Levaquin can't b Wed, 11 Mar 2009 18:12:27 -0400 http://www.medications.com/effect/view/39787?item=17886 Yeah, he will tell you it's all in your head and Levaquin can't be the cause. On the other hand, if you want the true story just keep searching online. You are not alone. The doctors just try to brush the truth under the rug. http://www.medications.com/effect/view/39787?item=17886