Ontario Registered Pharmacy Technician (RphT) Practice Exam

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Which of the following drugs is classes as an H2 Agonist?

  1. Clonidine

  2. Ranitidine

  3. Loratadine

  4. Clemastine

The correct answer is: Ranitidine

An H2 agonist is a medication that binds to and activates the H2 receptor, which can decrease the production of acid in the stomach. Clonidine, Loratadine, and Clemastine do not have any effect on the H2 receptor, therefore they are not considered H2 agonists. Ranitidine, on the other hand, binds to and activates the H2 receptor, making it an H2 agonist.

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