Nitrites and nitrates can cause which condition when given in therapeutic doses?

Nitrites and nitrates can cause which condition when given in therapeutic doses?

• A. Hypercapnia
• B. Methemoglobinemia
• C. Acidosis
• D. Hyperkalemia

Answer: (B)

Nitrites and nitrates can lead to methemoglobinemia when administered in therapeutic doses. This condition occurs when nitrites oxidize the iron in hemoglobin from the ferrous (Fe2+) to the ferric (Fe3+) state, which reduces the hemoglobin's ability to bind and carry oxygen effectively. When methemoglobin levels increase, patients may present with symptoms like cyanosis, fatigue, and even altered mental status due to decreased oxygen delivery to tissues. The diagnosis is typically confirmed by measuring the levels of methemoglobinemia, which can be done with specific blood tests. Understanding the mechanism by which nitrites induce methemoglobinemia helps in recognizing the potential adverse effects of these medications, particularly in critical care settings where patients may be more susceptible to disturbances in oxygen transport. The other options, while related to acute care scenarios, do not result directly from the administration of nitrites and nitrates in the same way as methemoglobinemia does.

Nitrites and nitrates can lead to methemoglobinemia when administered in therapeutic doses. This condition occurs when nitrites oxidize the iron in hemoglobin from the ferrous (Fe2+) to the ferric (Fe3+) state, which reduces the hemoglobin's ability to bind and carry oxygen effectively.

When methemoglobin levels increase, patients may present with symptoms like cyanosis, fatigue, and even altered mental status due to decreased oxygen delivery to tissues. The diagnosis is typically confirmed by measuring the levels of methemoglobinemia, which can be done with specific blood tests.

Understanding the mechanism by which nitrites induce methemoglobinemia helps in recognizing the potential adverse effects of these medications, particularly in critical care settings where patients may be more susceptible to disturbances in oxygen transport. The other options, while related to acute care scenarios, do not result directly from the administration of nitrites and nitrates in the same way as methemoglobinemia does.