A nurse is providing an in-service about medications that are first-generation antihistamines.
Which of the following medications should the nurse include in her in-service?

Choice A rationale

While metformin is commonly used as a first-line medication for type 2 diabetes, this choice does not specifically address a critical safety concern related to metformin.

Choice B rationale

Metformin can interact with contrast dyes used in imaging studies, increasing the risk of acute renal failure due to lactic acidosis. Patients need to be aware of this interaction to avoid potential complications.

Choice C rationale

Metformin is used to lower blood glucose levels, not increase them. This choice is incorrect.

Choice D rationale

While metformin is associated with less weight gain compared to other diabetes medications, this choice does not address the critical interaction with contrast dye.

Choice A rationale

Metformin is an oral diabetes medication that can interact with iodine-containing contrast dye, potentially leading to lactic acidosis.

Choice B rationale

Levothyroxine is used to treat hypothyroidism and does not interact with iodine-containing contrast dye.

Choice C rationale

Insulin Lispro is a rapid-acting insulin used to control blood sugar levels in diabetes and does not interact with iodine-containing contrast dye.

Choice D rationale

NPH Insulin is an intermediate-acting insulin used to control blood sugar levels and does not interact with iodine-containing contrast dye.