Tag: NTI drugs

FDA Bioequivalence Standards for NTI Drugs: Special Requirements Explained
FDA Bioequivalence Standards for NTI Drugs: Special Requirements Explained
Mar, 15 2026 Medications Bob Bond
The FDA enforces strict bioequivalence standards for narrow therapeutic index (NTI) drugs to ensure safety. These drugs require tighter limits (90-111%) and specialized testing to prevent dangerous dosage variations. Learn which drugs are affected and what this means for patients.
Prior Authorization for NTI Drugs: When Insurers Require Brand-Name Medications
Prior Authorization for NTI Drugs: When Insurers Require Brand-Name Medications
Feb, 19 2026 Medications Bob Bond
Prior authorization for narrow therapeutic index (NTI) drugs like levothyroxine and phenytoin is a critical issue - insurers often require brand-name versions due to safety risks, even when generics exist. Learn why these drugs are different and how to fight for access.