What is the primary treatment for a client diagnosed with pernicious anemia?

The primary treatment for pernicious anemia is Vitamin B12. This condition arises due to a deficiency of Vitamin B12, which is often linked to a lack of intrinsic factor, a protein necessary for the absorption of this vitamin in the intestine. Individuals with pernicious anemia cannot effectively absorb Vitamin B12 from the diet, leading to a significant decrease in red blood cell production and resulting symptoms such as fatigue, weakness, and neurological issues.

Administering Vitamin B12, often through intramuscular injections, directly addresses the deficiency and helps in replenishing the body’s stores. This treatment not only resolves hematological symptoms but also plays a crucial role in preventing neurological complications associated with prolonged deficiency. Regular monitoring and lifelong supplementation are typically required for those diagnosed with pernicious anemia.

Other treatments like thiamine, iron dextran, and folic acid do not specifically correct the underlying issue of Vitamin B12 deficiency, which makes Vitamin B12 the most appropriate and effective treatment for this condition.