Key takeaways
Isoniazid (generic) and Levofloxacin (generic) are both antibiotics, but they treat different types of infections. Isoniazid is mainly used to treat and prevent tuberculosis (TB) and works by stopping TB bacteria from making their protective covering. It can be taken orally or by injection and is very affordable. However, it can cause serious liver damage and nerve problems, and it interacts with many foods and medications. On the other hand, Levofloxacin is a fluoroquinolone antibiotic used to treat a variety of bacterial infections like pneumonia and urinary tract infections (UTIs). It is usually taken once daily and is available in tablet, liquid, and injection forms. Levofloxacin has many serious side effects, including tendon rupture and nerve damage, and is typically only used when safer options aren't available. Both medications require a prescription and have generic forms available.
