0
ARTICLE |

Possible Nafcillin-Warfarin Interaction

Greta M. Heilker, PharmD; John W. Fowler, MD; Timothy H. Self, PharmD
Arch Intern Med. 1994;154(7):822-824. doi:10.1001/archinte.1994.00420070152023.
Text Size: A A A
Published online

There are multiple reports of drug interactions with warfarin in the literature. Many of these result in resistance to warfarin therapy due to enzyme inducers such as barbiturates, carbamazepine, and rifampin, with resulting decreased warfarin effect and prothrombin time (PT).1-3 Nafcillin is not well documented as an inducer of drug metabolizing enzymes, yet it appears to have this effect on warfarin.4 We recently observed a possible interaction between nafcillin and warfarin.

Report of a Case.  A 71-year-old woman was admitted with a 3-month history of left lower extremity swelling and a 3-week history of pain, tenderness, and edema. On admission, an attempted left lower leg ultrasound was unsuccessful due to swelling of the lower leg. Therefore, her admitting diagnosis was rule-out deep vein thrombosis vs cellulitis of the lower leg. Her medicines prior to admission included levothyroxine (0.125 μg daily), extended-release nifedipine (60 mg twice daily), extended-release potassium

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

References

Correspondence

CME
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s “Cited By” API will populate this tab (http://www.crossref.org/citedby.html).
Submit a Comment

Some tools below are only available to our subscribers or users with an online account.

Web of Science® Times Cited: 5

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

Jobs