hydrochlorothiazide vs isradipine
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Side-by-side comparison of hydrochlorothiazide and isradipine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Hydrochlorothiazide: A study in normal healthy volunteers has shown that concomitant administration of isradipine and hydrochlorothiazide does not result in altered pharmacokinetics of either drug. In a study in hypertensive patients, addition of isradipine to existing hydrochlorothiazide therapy did not result in any unexpected adverse effects, and isradipine had an additional antihypertensive effect.
Microzide
DynaCirc
No summary available.
Isradipine is a drug that helps lower high blood pressure. It belongs to a class of drugs called calcium channel blockers.
Information not available.
Isradipine capsules are used to treat high blood pressure. You can take it alone or with a thiazide diuretic (water pill). It may take 2 to 4 weeks to see the full effect.
Information not available.
Isradipine blocks calcium from entering certain cells. This action relaxes blood vessels, which lowers blood pressure. Lowering blood pressure helps prevent strokes, heart attacks, and kidney problems.
- • Dizziness
- • Headache
- • Cough
- • Fatigue
- • Headache
- • Dizziness
- • Swelling in ankles or feet
- • Feeling your heart beat rapidly or irregularly
- • Fatigue
- Fatigue 10,014
- Nausea 9,709
- Diarrhoea 8,311
- Pain 7,663
- Dyspnoea 7,582
- Drug Interaction 32
- Dyspnoea 31
- Hypertension 29
- Acute Kidney Injury 26
- Nausea 26
No specific warnings noted.
If you are taking cimetidine, your doctor should watch you closely for side effects when you start isradipine. If you are taking rifampicin, isradipine may not work as well.
No pregnancy information available.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if isradipine will harm your unborn baby. Talk to your doctor about the risks and benefits of taking isradipine while breastfeeding.
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How to Read This hydrochlorothiazide vs isradipine Comparison
hydrochlorothiazide is classified in the Thiazide Diuretic drug class, while isradipine sits within the Calcium Channel Blocker class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, hydrochlorothiazide has 43,279 submissions while isradipine has 144. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to these medicines work in different ways to lower blood pressure, which can lead to a stronger effect when taken together.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for hydrochlorothiazide or isradipine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.