Pharmaceutical fillers are inactive substances added to medications to provide bulk, stability, or enhance the drug's properties. These fillers can improve the consistency of tablets and capsules, making them easier to manufacture and consume. Common fillers include lactose, starch, and microcrystalline cellulose. In addition to improving the physical characteristics of drugs, fillers can also aid in the absorption of the active ingredients in the body. They play a crucial role in ensuring that medications are effective and safe for patients, while also helping to maintain the integrity of the product during storage and transport.