What is another word for inactive substance?
Pronunciation: [ɪnˈaktɪv sˈʌbstəns] (IPA) 
The term "inactive substance" is commonly used in the pharmaceutical industry to refer to a substance that is added to a medication for reasons other than its therapeutic benefits. It can also refer to the ingredients in a placebo drug that has no active ingredient. There are several synonyms for this term, including excipient, diluent, carrier, and filler. These terms are often used interchangeably but have slightly different meanings based on their specific use in a drug formulation. Excipients are substances added to a medication to aid its delivery, while diluents are added to decrease the concentration of the active ingredient. Carriers are substances used to dissolve and transport the active ingredient, and fillers are added to achieve a specific size or shape for the medication.
