Jantoven

Brand for warfarin

Without insurance

With insurance

Compare prices at 50K+ pharmacies nationwide

Most insurance accepted

Board-certified clinicians

No hidden fees

Available nationwide

What is Jantoven?

Jantoven is an oral anticoagulant—a blood thinner—used to prevent and treat blood clots in conditions including atrial fibrillation, deep vein thrombosis, pulmonary embolism, and after heart valve replacement. It works by blocking the vitamin K-dependent clotting factors the liver produces, reducing the blood's ability to form dangerous clots. Because Jantoven's effect varies widely between individuals based on diet, genetics, and other medications, it requires regular INR blood tests to ensure the dose is in the therapeutic range—effective without being dangerously high.

Vitamin K antagonism

Inhibits the enzyme that recycles vitamin K, preventing the liver from producing functional clotting factors II, VII, IX, and X — reducing the blood's clotting ability in a measurable, adjustable way.

Adjustable anticoagulation

Unlike newer anticoagulants with fixed dosing, Jantoven's dose can be precisely titrated based on INR test results — allowing for fine-tuned anticoagulation in people with complex needs or those requiring very specific therapeutic targets.

Long-established stroke and clot prevention

Decades of clinical use in atrial fibrillation, mechanical heart valves, and thromboembolic disease have established Jantoven as a foundational anticoagulant — particularly in situations where newer agents haven't been studied or aren't appropriate.

Ongoing support, always available.

Your care doesn’t end after your visit. Message your care team anytime to discuss side effects, ask questions about your medication, or request a refill.

We stay proactive so your care stays steady — adjusting your plan as needed and keeping you informed every step of the way.

What our customers have to say

4.7 stars from 550+ reviews

Everything is upfront

Everything is upfront and exactly what they state. No hidden costs or fees. Great experience!

Leslie

I felt heard and they followed through

I felt heard and they followed through until my prior authorization was approved after it was denied. They maintained communication with me until I received my medication.

Nichelle C

Got refills quickly and affordably

I needed medication refills, and they were able to fill them quickly and affordably.

Mya Harbison

Quick and easy from booking to Zoom

Everything was quick and easy from booking the blood work to our Zoom appointment. The doctor was pleasant and attentive.

Judy S

Listened and responded right away

The physician I was paired with listened to all of my concerns and responded right away. She was thorough, and I received my medication within hours.

Camille

Prescription confirmed within 45 minutes

I’d run out of a medication while I was in the process of changing doctors. I provided some information, and my prescription was done and confirmed within 45 minutes.

Mark

Thorough history check and a prompt prior authorization

They were very thorough in checking my medical history for any possible problems with the new medication, and very prompt in handling the prior authorization with the pharmacy and the insurance carrier.

Louis

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