hi , i cant relate to your uti problem but i did have a very serious sinus infection and im still on a 10 day course of
levaquin for it. the strange thing i saw in your story was that you got a bad cold while on
levaquin??? The only symptoms of the sinus infection i had BEFORE the
levaquin was immense facial pressure and postnasal drip ,thats it !! ANyway, to the point, after i think 3 days on the
levaquin , i got the NASTIEST head cold out of nowhere ( i mean i felt fine one half of the day, took an hour nap, and woke up with a MASSIVE sore throat and completely stuffed up nose). I am still getting over that cold or whatever the heck it was that struck me, and its been a week since the first symptoms. I know how you feel, it was just a strange thing that we both got sick out of nowhere after being on
Levaquin. Just give your body some time to heal and make sure ur getting good nutrients, water and sleep. Everything combining into one big sick fest is probably what is doing your body in. Keep taking whatever meds youre on and just rough it out, sometimes several illnesses overlapping will take longer to heal from than just one your body has to deal with. As far as taking the antihistamine and feeling better, that wouldnt surprise me at all!!! An antihistamine blocks some of the bodies inflammatory response to illness, etc and that is what makes you physically feel ill, not the organism doing it. So if youre supressing it, no wonder you feel better

On another point, I dunno about you but
levaquin is giving me some severe insomnia which alot of people on these boards have replied to me and said they expierienced the same thing. So if you cant sleep well, thats probably another reason why the healing is so slow. Your body does most of its repair at night while you are sleeping. Good luck , and i hope you get well soon!! Ill be workin on the same task for myself with ya!!