Antihistamine

High school (ages 12+)
Human Body

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/antihistamine

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the key receptor types?H1 receptors (allergic reactions, CNS effects) and H2 receptors (gastric acid secretion)
2. What is the therapeutic applications?Allergic rhinitis, urticaria, motion sickness, vertigo, insomnia, peptic ulcers, acid reflux
3. Why do some antihistamines make you sleepy?Old antihistamines can cross into the brain and cause drowsiness, dry mouth, and blurred vision, so doctors now use newer ones that don't make you sleepy.
4. How do antihistamines help with stomach acid?Antihistamines that target H2 receptors reduce the amount of acid the stomach makes, which helps heal ulcers and stop acid reflux.

Constitutive Activity: The ability of a receptor to be active and signal even without a ligand binding to it.
Inverse Agonist: A drug that binds to a receptor and reduces its basal activity, stabilizing it in an inactive state.
Blood-Brain Barrier: A protective barrier that separates the brain's circulating blood from the brain tissue itself.