A patient who is prescribed liothyronine (Cytomel) also takes warfarin (Coumadin). Which laboratory blood test result indicates to the nurse a possible drug interaction?
a. Hematocrit 42%
b. Hemoglobin 14.2 g/dL
c. Blood urea nitrogen (BUN) 12 mg/dL
d. International normalized ratio (INR) 4.5
D
Liothyronine increases the effectiveness of warfarin. Warfarin's effectiveness is measured by the INR. This value should be between 1.5 and 3.0 in a patient taking warfarin. With an INR level of 4.5 the patient is at extreme risk for excessive bleeding.
You might also like to view...
You are caring for a patient with sickle cell disease in her home. Over the years, there has been joint damage, and the patient is in chronic pain. The patient has developed a tolerance to her usual pain medication
When does the tolerance to pain medication become the most significant problem? A) When it results in inadequate relief from pain B) When dealing with withdrawal symptoms resulting from the tolerance C) When having to report the patient's addiction to her physician D) When the family becomes concerned about increasing dosage
To inspect the cornea, the examiner should shine a light:
A) Directly on the cornea. B) From the side across the cornea. C) From the top of the cornea. D) From an oblique angle.
Which vitamin can be toxic if consumed in large amounts?
A. Niacin B. Vitamin C C. Vitamin A D. Folic acid
A nurse providing medication education about loop diuretics advises patients to avoid eating licorice. What is the nurse's rationale for this statement?
1. Licorice causes acid-base imbalances. 2. Licorice can cause potassium loss. 3. Licorice can cause sodium retention. 4. Licorice can cause gastric irritation. 5. Licorice causes renal absorption of calcium.