Purity and process are different, and the effect is very different. Penicillin produced in the United States does not require skin testing, while domestically produced penicillin is about twenty years behind and requires all skin testing. For example, ceftriaxone has a very good effect in treating meningitis. Most domestically produced ones cost about one yuan, while Taiwanese ones can pass through the brain barrier smoothly. For the same 1g, twenty domestically produced pills cannot reach this level. Effect.