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ketoconazole vs ranolazine

Side-by-side comparison of ketoconazole and ranolazine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.

major Known Drug Interaction

( 7.2 ) 7.1 Effects of Other Drugs on Ranolazine Strong CYP3A Inhibitors Do not use ranolazine with strong CYP3A inhibitors, including ketoconazole, itraconazole, clarithromycin, nefazodone, nelfinavir, ritonavir, indinavir, and saquinavir [see Contraindications (4) , Clinical Pharmacology (12.3) ].

Recommendation: Do not use these two medications together because the risk of side effects is too high.

Drug Class
ketoconazole Azole Antifungal
ranolazine Late Sodium Current Inhibitor (Antianginal)
Type
ketoconazole Over-the-Counter
ranolazine Prescription
Summary
ketoconazole

Ketoconazole shampoo is an antifungal medicine. It treats a fungal infection on your skin.

ranolazine

Ranolazine extended-release tablets help treat chronic angina (chest pain). It can be used with other heart medicines.

What It Treats
ketoconazole

This shampoo treats tinea versicolor, a fungal infection. This infection can cause patches on your skin that are lighter or darker than the surrounding skin. These patches may appear on your trunk, neck, arms, and upper thighs.

ranolazine

Ranolazine is used to treat chronic angina, which is chest pain that keeps coming back. It can help you have fewer angina episodes. You can take this medicine with other drugs like beta-blockers or nitrates.

How It Works
ketoconazole

Ketoconazole is an antifungal medicine. It works by stopping the growth of the fungus. This helps to clear up the infection.

ranolazine

Ranolazine works by affecting the sodium channels in your heart cells. This helps to improve blood flow to your heart. It reduces the amount of calcium in your heart, which can help prevent angina.

Common Side Effects
ketoconazole

No common side effects listed.

ranolazine
  • Dizziness
  • Headache
  • Constipation
  • Nausea
FAERS Reports
ketoconazole
  • Feeling tired 929
  • Itching 902
  • Feeling sick to your stomach 834
  • Skin breakout 802
  • Loose stool 760
ranolazine
  • Death 816
  • Heart attack 640
  • Chest pain 605
  • Angina 594
  • Stent placement 582
Serious Warnings
ketoconazole

You should not use this shampoo if you are allergic to ketoconazole or any of the other ingredients.

ranolazine

Ranolazine can cause changes in your heart's electrical activity (QT prolongation). If you have kidney problems, your doctor should check your kidney function. If you develop kidney failure, stop taking ranolazine.

Pregnancy
ketoconazole

It is not known if ketoconazole shampoo can harm an unborn baby. Talk to your doctor if you are pregnant or breastfeeding before using this medicine.

ranolazine

It is not known if ranolazine can harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is also not known if ranolazine passes into breast milk. Discuss with your doctor if you are breastfeeding.

Also Compare, Nearby Drugs

How to Read This ketoconazole vs ranolazine Comparison

ketoconazole is classified in the Azole Antifungal drug class, while ranolazine sits within the Late Sodium Current Inhibitor (Antianginal) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are split between OTC and prescription status, which affects access and supervision.

Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, ketoconazole has 4,227 submissions while ranolazine has 3,237. 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 major interaction flagged in FDA labeling, attributed to ketoconazole stops the body from breaking down ranolazine, which can cause the drug to build up to unsafe levels in your blood.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.

A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between ketoconazole and ranolazine - always consult your physician or pharmacist first.

Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.