Tag: therapeutic index

Prescriber Attitudes Toward NTI Drugs and Substitution
13 February 2026 Ian Glover

Prescriber Attitudes Toward NTI Drugs and Substitution

Prescribers remain cautious about substituting generic versions of narrow therapeutic index (NTI) drugs due to safety concerns, despite FDA assurances. Real-world data, state laws, and clinical experience shape ongoing debates over substitution practices.