H1 Antagonist: Definition & Side Effects


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question 1 of 3

The chemical messenger released from mast cells, which triggers increased mucus production, increased blood flow to an area, and increased tear production is _____.

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1. A middle-aged man comes to your office for evaluation of watery eyes, runny nose, and sneezing. He reports it happens every April and lasts for about one month. He is a truck-driver, who is working overtime at present. You diagnose seasonal allergies. Which would be the BEST medication to prescribe for this patient?

2. A teenage girl comes to your office for evaluation of a rash that appeared three days ago, shortly after she went hiking in the woods. It is extremely itchy and keeps her awake at night. You diagnose poison ivy rash. Which would be the BEST medication to prescribe for this patient?

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About This Quiz & Worksheet

These questions will help you test your knowledge of H1 antagonists. Questions will focus on specific chemicals as well as treatment options.

Quiz & Worksheet Goals

In this worksheet and quiz you'll measure your understanding of:

  • What chemical messenger leads to mucus and tear production
  • How antihistamines work in the body
  • What term describes the earliest antihistamines

Skills Practiced

  • Defining key concepts - ensure that you can accurately identify main phrases from their descriptions, such as what early antihistamines are called
  • Information recall - access the knowledge you've gained regarding what chemical messenger can lead to mucus and tear production
  • Knowledge application - use your knowledge to answer questions about what type of antihistamines a doctor might prescribe based on symptoms and patient history

Additional Learning

Want to know more about this type of chemical reaction? Read the lesson titled H1 Antagonist: Definition & Side Effects to learn about new concepts, including:

  • Examples of what can trigger this chemicals production in the body
  • What H1 receptors do in the body
  • Which generation of drugs is the most recent to be developed