If you are on warfarin (Coumadin), it is important to have a consistent level of the drug in your body, as too much warfarin can cause excessive bleeding, while too little can cause blood clot formation. At Colonial Pharmacy we offer ONE STOP warfarin monitoring. Our experienced pharmacists can quickly test your blood, make any needed dosing adjustments, and fill your new prescription on the spot, saving you valuable time. Your prescriber is always notified about your progress. In order to take advantage of this special service, we will need a referral from your physician. Click here for printable referral form.