You'll feel good about taking Mucinex because it's the only FDA-approved, 12 hour extended-release guaifenesin product that provides relief in a convenient bi-layer tablet. The white layer immediately releases the medicine. The colored layer works steadily to release medication hour after hour, for 12 hours.

Plus, Mucinex is convenient to take. Just one dose lasts for 12 hours. That's good news when you can't have congestion slowing you down.