Bactrim and pharmacist

I talked to the pharmacist and she said the half life for Bactrim is 3 days. And sure enough you could have set a clock to it, I started feeling tons better 3 days after my last dose. Thank you LORD!!!

BEWARE OF TENDON RUPTURE DUE TO BACTRIM / LEVAQUIN
I had a UTI that was resistant to Bactrim. After ten days of Bactrim I was put on ten days of Levaquin. Ended up with white blotches (I am dark-
skinned) all over my body. But that's not all. Then my Achilles tendons nearly burst. Horrible pains I couldn't imagine how it was caused. Come to find out that both Bactrim and Levaquin have tendon rupture as a side-effect (never heard it from the doctor or pharmacist though). Since I was on both for a total of twenty days... I suppose I was fair game. Medicine is often a good thing for many who could not reduce or alleviate their ailments without it -- but I would have really liked to have known my increased risk of tendon rupture BEFORE the fact. The odds are probably quite remote for anyone to experience tendon rupture when taking these antibiotics, but were elevated in my case due to the immediate back-to-back, double-dose of Bactrim and levaquin. I hope this posting can prevent my experience from happening to someone else.

After having many UTI's in the past, the problem with Bactrim was that it stopped working. I developed an immunity or tolerance to the drug, which didn't help with my next infection. I was then prescribed Levaquin, which, despite the cost, works, but it does take longer for the infection to completely clear up. Sometimes I wish I could take Bactim like I used to. $$$