Vitamin D & thiazide-diuretics

Our assessment

Based on the data provided, no specific safety findings or adverse event reports are available for the interaction between vitamin D and thiazide diuretics. The data for this specific combination is not available, so a complete safety profile cannot be constructed from the provided information. Patient safety requires caution when data is missing.

How it works

Thiazide diuretics can reduce urinary calcium excretion, and vitamin D increases intestinal calcium absorption. The theoretical concern is that combining these agents could lead to hypercalcemia (elevated blood calcium levels). However, the provided data does not include any studies or FDA adverse event reports to confirm or quantify this risk for this specific interaction.

Safety profile

Data not available. No FDA adverse event reports or study data were provided for the combination of vitamin D and thiazide diuretics. Without specific data, no side effects with report counts can be cited. This does not mean the combination is risk-free, but that the provided data does not contain information on adverse outcomes.

Our recommendation

Because data on this specific interaction is not available, individuals taking thiazide diuretics should monitor for signs of hypercalcemia, such as nausea, vomiting, constipation, or confusion, and should have their blood calcium levels checked by a healthcare provider if starting high-dose vitamin D supplementation. This cautious approach is based on the absence of safety data rather than proven risk FDA FAERS ↗.