Coumadin Clinic (Anticoagulation Clinic)

541 Main Street, Suite 420
South Weymouth, MA 02190

Phone Number: 781-952-1291


Hours: Monday through Friday, 8:00 a.m. - 5:00 p.m.


Harbor Medical Associates is dedicated to providing area residents with world class heart care right in our community.  Providing a state-of-the-art anticoagulation clinic is just one example of our dedication to you.

The medication we use, warfarin sodium tablets, (brand name Coumadin) is an anticoagulation agent that prevents your body from forming clots it does not need.  Combined with your cardiac condition, these clots can cause serious medical problems.  Warfarin is not used to treat your cardiac condition; rather it is used to prevent further complications.

You will be tested regularly (at least monthly) while you are taking warfarin.  At first, the P-TIme will be done at least weekly until we find the proper dose for you.  Regular P-Times are critical in the effective use of warfarin.  The test is measured using an International Normalization Ratio, or INR.  We will assign a range for the INR based on your cardiac condition, personal history, and anticoagulation goal.  Your medication will be adjusted accordingly, and you will be given your next P-Time date.  It is critical that you follow these instructions closely for safe and effective anticoagulation.

You must remember to take your medication and have your P-Time checked as recommended.

Consistency in diet and daily activity helps maintain your prescribed level.

Contact our Anticoagulation Clinic with any questions or concerns you may have.

Do not, ever, change your dose without consulting us.