What is the difference between an expectorant, antitussive, and a mucolytic?

Please complete the following discussion post. The main post should be at least 500 words, You must APA format to develop your discussion and use 2 sources from a scientifically credible source from the US that are less than 5 years old.

Week 3 Discussion Prompt:

Expectorants, Antitussives, & Mucolytics

Respiratory Medications

1. What is the difference between an expectorant, antitussive, and a mucolytic?

2. Pick a disorder discussed this week in class (YOU CAN USE ASTHMA). What 2-3 are medications used to treat or manage this disorder? What are the mechanisms of action for each? What should the nurse check before, during, and after administration of this drug?