Can aluminum be used in medicine or pharmaceuticals?

Yes, aluminum is used in medicine and pharmaceuticals, primarily in the form of aluminum salts. It is used as an adjuvant in vaccines to enhance the body's immune response. Aluminum compounds are also used as antacids to neutralize stomach acid and in some medications as a buffering agent. However, its use is regulated due to potential health concerns, and it's important to note that aluminum is not used in direct contact with the body for extended periods due to its potential toxicity.