Related Experiment Video
Updated: May 8, 2026

A Package of Established Analytical Tools to Investigate the Solid-State Alteration of Lipid-Based Excipients
Published on: August 9, 2022
Stability of four commercial products delivered by mail order
1School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC.
Abstract:
The purpose of this study was to investigate the stability of four commercial tablets commonly shipped via mail-order delivery. The products were: enalapril maleate 10-mg tablets, digoxin 0.25-mg tablets, clorazepate dipotassium 7.5 mg-tablets, and pyridostigmine bromide 60-mg tablets. The stability studies were conducted at 50 deg C, and tablets were exposed for three, seven and 14 days to that temperature. The results demonstrated that all tablets studied were stable in these conditions for their exposure time. Therefore, it appears that all the tablets remained stable and could be used with confidence in mail-order delivery provided the original product packaging is not compromised.
More Related Videos
Related Concept Videos
Drug Product Stability
Pharmaceutical Alternatives: Stability-Related Therapeutic Nonequivalence
Stability of Substituted Cyclohexanes
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
Stability of Equilibrium Configuration: Problem Solving
Problem-solving in the context of the stability of equilibrium configuration...
Bioavailability Enhancement: Drug Stability Enhancement and GI Retention
Stability of Equilibrium Configuration
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...

