This is a great question, because while Sudafed is often the first thing people reach for, it doesn't work for every type of blocked ear—and in some cases, it can actually make things worse.
Here is a deep, practical guide to understanding when (and how) Sudafed will help blocked ears, and when it will do nothing. Sudafed (Pseudoephedrine) will only help blocked ears caused by Eustachian Tube Dysfunction (ETD) due to nasal/sinus congestion from a cold, flu, or allergies. will sudafed help blocked ears