Levofloxacin Hydrochloride and Levofloxacin belong to quinolone antibiotics, which are basically similar in terms of therapeutic efficacy and function, and the main difference lies in the production process, price and specification. 1. Production process: Levofloxacin hydrochloride belongs to hydrochloride, which is more stable and non-denaturing, and the production is more simple; Levofloxacin is more active and easier to decompose, and the production is more complicated. 2. Price: Levofloxacin Hydrochloride has a lower price due to its simple production and easier preservation; Levofloxacin has a higher price due to its complicated production, easy decomposition and difficult preservation. 3. Specification: Levofloxacin hydrochloride usually has three specifications: 0.1g, 0.2g and 0.25g; while Levofloxacin usually has two specifications: 0.1g and 0.5g. Levofloxacin and levofloxacin hydrochloride are both quinolone antibiotics, with similar contraindications and adverse reactions after use. Some patients may experience adverse reactions such as nausea, vomiting, headache, dizziness, tendonitis, etc. The use of Levofloxacin and Levofloxacin Hydrochloride is prohibited for those who are allergic to the product, infants and young children, pregnant women, lactating women and so on. If you need to use the above drugs, you should be under the guidance of a professional physician and strictly follow the doctor’s instructions to avoid serious adverse reactions.