There are various synonyms for the term "inactive medicines" or "inert ingredients". Some common synonyms include excipients, placebos, fillers, diluents, binders, and disintegrants. Excipients are substances that are added to medications to assist with drug delivery or to provide a physical form to the drug. Placebos are inactive substances that are used in medical studies as substitutes for active drugs. Fillers and diluents are also often used to bulk up medications and make them easier to handle. Binders are substances that are employed in solid dosage forms to hold the drug particles together. Lastly, disintegrants are utilized in tablets to help the medication dissolve rapidly in the body once ingested.