3. I am bactericidal and I am used to treat urinary and respiratory infections by destroying their bacterial DNA. Althou

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3. I am bactericidal and I am used to treat urinary and respiratory infections by destroying their bacterial DNA. Although I am good at my job, I can cause cardiac arrhythmia therefore, I come with a black box warning. In addition, runners and athletes do not like me very much due to problems I cause for them. What drug class am I? What problems can occur in athletes taking these medications? March out the drug class according to categories.
4. I am bactericidal and I do not go the PO route because I do not mix well with stomach acid. I am known to cause kidney and hearing problems due to having a narrow therapeutic index. What drug class am I? What method is used to determine if I am within the therapeutic index? Please explain in detail. In addition, I do not play well in the sandbox with vitamin K therefore, what drug class do I interact poorly with and explain what happens when we meet.