Which condition would contraindicate alendronate therapy?

Which condition would contraindicate alendronate therapy?

• A. Hyperkalemia
• B. Hypertension
• C. Hypocalcemia
• D. Hyperglycemia

Answer: (C)

Alendronate relies on normal calcium balance to be safe and effective. Bisphosphonates lower bone resorption, which reduces the amount of calcium released from bone into the blood. If calcium in the blood is already low, starting alendronate can push it further down, risking serious hypocalcemia with symptoms like muscle cramps, tingling, or cardiac issues. For that reason, hypocalcemia is a contraindication to starting alendronate until calcium (and vitamin D) levels are corrected. The other conditions listed don’t directly prevent starting the medication, because they don’t interfere with calcium balance or the drug’s mechanism in the same immediate way. Hyperkalemia, hypertension, and hyperglycemia may require separate management but are not contraindications to alendronate by themselves.

Alendronate relies on normal calcium balance to be safe and effective. Bisphosphonates lower bone resorption, which reduces the amount of calcium released from bone into the blood. If calcium in the blood is already low, starting alendronate can push it further down, risking serious hypocalcemia with symptoms like muscle cramps, tingling, or cardiac issues. For that reason, hypocalcemia is a contraindication to starting alendronate until calcium (and vitamin D) levels are corrected.

The other conditions listed don’t directly prevent starting the medication, because they don’t interfere with calcium balance or the drug’s mechanism in the same immediate way. Hyperkalemia, hypertension, and hyperglycemia may require separate management but are not contraindications to alendronate by themselves.