Which class of drugs is successful in treating an ulcer caused by
H. pylori?

The correct answer is B. 10 units of Humulin R insulin in a 500-unit insulin syringe.

Choice A rationale: This choice is incorrect because a 100-unit syringe would not be able to hold enough U-500 insulin (5 times more concentrated) to deliver the prescribed 10 units. Using a 100-unit syringe could lead to an inaccurate dose.

Choice B rationale: This choice is correct. U-500 Humulin R insulin is a concentrated form containing 5 times more insulin per milliliter compared to U-100 insulin. Therefore, a 500-unit syringe is appropriate to measure the prescribed 10 units accurately.

Choice C rationale: This choice is incorrect. A 30-unit syringe would not have the capacity to hold even the 10 units of U-500 insulin. It would be impossible to draw up the correct dose with this syringe size.

Choice D rationale: This choice is incorrect. Similar to choice A, a 50-unit syringe is not suitable for U-500 insulin due to its limited capacity. It would lead to an inaccurate measurement of the 10-unit dose.

Choice A rationale

Barbiturates are a class of drugs that were once commonly used to treat conditions like anxiety and insomnia. However, they have largely been replaced by other classes of drugs, such as benzodiazepines, because barbiturates have a high risk for physical and psychological dependence.
Choice B rationale
Nonsteroidal anti-inflammatory drugs (NSAIDs) are primarily used to treat pain and inflammation. While they can cause side effects, they do not typically lead to physical or psychological dependence.
Choice C rationale
Benzodiazepines are commonly used to treat anxiety and insomnia. While they can lead to physical and psychological dependence, they are not rarely used. In fact, they are among the most commonly prescribed medications for these conditions.
Choice D rationale
Selective serotonin reuptake inhibitors (SSRIs) are a type of antidepressant medication. They can be used to treat anxiety, but they do not typically lead to physical or psychological dependence.