IIG (Inactive Ingredient Guide Database) algorithm retrieves the largest value of each excipient for each route of administration and dosage form in FDA’s master database but does not reveal the formulation of any product. 


Maximum Potency currently shown in the IID comes from multiple approved products containing the excipient.


Maximum Potency in IID (P) = the highest amount of the excipient per dosage unit. 


Maximum Daily Intake (MDI) also comes from multiple products containing the excipient but is based on a calculation of excipient exposure due to maximum daily dose (MDD). Since products that are dosed multiple times a day leading to a maximum daily exposure may not be the same as those products with the highest unit dose amount of the excipient.


MDI Calculation

MDI = (MDD/A) × P



Maximum Potency vs. Maximum Daily Exposure

As per FDA guidance,

The maximum potency currently shown in the IID comes from multiple approved products containing the excipient. It is the highest amount of the excipient per dosage unit. 

Maximum daily exposure also comes from multiple products containing the excipient but is based on a calculation of excipient exposure due to maximum daily dose.


Resource Person: Dr. Shivang Chaudhary