Hydroxychloroquine Pharmacology

Hydroxychloroquine is classified as a DMARD and when used chronically, can be helpful in managing rheumatoid arthritis and Lupus.

There have been reports of QTc prolongation with hydroxychloroquine. While not incredibly common, it is important to remember this consideration in patients at risk for QTc prolongation.

Hydroxychloroquine is associated with causing retinopathy. Routine eye exams for monitoring purposes are critical.

Rarely, hydroxychloroquine can be associated with blood disorders like neutropenia and thrombocytopenia. In addition, alterations in liver function have been reported.

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Sulfasalazine Pharmacology

Sulfasalazine is a medication that can be used for diseases like rheumatoid arthritis, Crohn’s disease, and Ulcerative Colitis.

Because sulfasalazine can cause GI upset, this is a major reason why we try to break up the dose and give it multiple (at least two) times per day.

LFT and CBC monitoring are recommended with sulfasalazine due to its low potential to cause liver dysfunction, aplastic anemia, and agranulocytosis.

Sulfasalazine can impair folic acid absorption and lead to potential deficiency. A patient deficient in folic acid is at higher risk for developing anemia.

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