MODERATE — Monitor Closely
🟡 USE CAUTION — Vitamin D and Hydrochlorothiazide may interact. Talk to your doctor before combining.
Evidence level: MODERATE
HCTZ keeps calcium in your body, Vitamin D absorbs more. Together blood calcium could get too high. Get levels checked.
Thiazides reduce calcium excretion + Vitamin D increases absorption → potential hypercalcemia.
The interaction between Vitamin D and Hydrochlorothiazide is manageable with awareness. Talk to your doctor or pharmacist, especially if you notice any new or unusual symptoms after combining them.
Take Hydrochlorothiazide as prescribed. Vitamin D with a meal (fat-containing if it's a fat-soluble vitamin: A, D, E, or K). Space 1-2 hours apart for clean absorption. Vitamins rarely cause dramatic drug interactions, but always inform your pharmacist about your full supplement regimen.
Risk may increase with: older age, liver or kidney impairment, taking multiple medications, and higher doses of either substance.
Monitor for any new or unusual symptoms when starting this combination. Report changes to your healthcare provider.
Mention this combination at your next appointment. Ask: "Should I adjust timing or doses of Vitamin D and Hydrochlorothiazide?" Your doctor may want to monitor specific lab values.
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
HCTZ keeps calcium in your body, Vitamin D absorbs more. Together blood calcium could get too high. Get levels checked.
Take Hydrochlorothiazide as prescribed. Vitamin D with a meal (fat-containing if it's a fat-soluble vitamin: A, D, E, or K). Space 1-2 hours apart for clean absorption. Vitamins rarely cause dramatic drug interactions, but always inform your pharmacist about your full supplement regimen.
Monitor for any new or unusual symptoms when starting this combination. Report changes to your healthcare provider.
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Mention this combination at your next appointment. Ask: "Should I adjust timing or doses of Vitamin D and Hydrochlorothiazide?" Your doctor may want to monitor specific lab values.
Or browse the full interaction database (121,000+ pairs).