Tag: NTI drugs

26 Jan

FDA Bioequivalence Standards for NTI Drugs: What You Need to Know

Andy Murray
14

The FDA enforces stricter bioequivalence rules for narrow therapeutic index (NTI) drugs like warfarin, phenytoin, and digoxin. Learn why these drugs need tighter limits, specialized testing, and how they differ from regular generics.

7 Jan

Medications

State Laws on NTI Drug Substitution: How Rules Vary Across the U.S.

Andy Murray
10

NTI drugs require precise dosing, but U.S. states have wildly different rules on swapping them with generics. Some ban substitutions. Others leave it up to pharmacists. Here’s how the patchwork of laws affects your safety.