The release exponent n is one of the most cited numbers in ER formulation literature — and one of the most misinterpreted. Here's a practical breakdown of what it means, when it applies, and what to do when your n sits in the "anomalous" range between 0.45 and 0.89.
K4M, K15M, K100M — the viscosity grade of your HPMC determines how fast the matrix swells, how quickly water ingresses, and ultimately how the drug diffuses out. Here's a practical guide to selection, with expected Higuchi kH values for each grade.
The tools I built for NovadoseAI started as scripts I ran in my own consulting work. This post explains the problem they solve — and why mechanistic grounding matters more than raw AI capability when you're trying to make defensible formulation decisions.