Is it safe to take levaquin for 5 days?

I'm 17. I have a UTI, and I'm peeing out blood and it hurts and burns. The doctor prescribed me Levaquin. But I've heard the bad effects it has on people, like tendon rupture, heart changes, liver damage. Just the bad effects. My doctor prescribed them to me for 5 days. How long do you have to be taking... show more I'm 17. I have a UTI, and I'm peeing out blood and it hurts and burns. The doctor prescribed me Levaquin. But I've heard the bad effects it has on people, like tendon rupture, heart changes, liver damage. Just the bad effects. My doctor prescribed them to me for 5 days. How long do you have to be taking them in order for the bad effects to happen?
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