Javascript Is Disabled!

PharmGKB requires Javascript.

Here are the instructions on how to enable JavaScript in your web browser.

PharmGKB will be evolving into the ClinPGx webite; more information coming soon!

hide banner

Menu

Publications News(opens in new window)Downloads Contact

Focus

Pediatric Focus

Pediatric Help Pediatric Dashboard

Help

Guideline Annotation PA166202621

Navigate to...

Show section selector dropdown

Loading...

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a health care professional. Individuals should not change their health behavior solely on the basis of information contained on this website. If you have questions about the information contained on this website, please see a health care professional.

About PharmGKB FAQ Policies

Downloads Citing

Acknowledgements Collaborators

PharmGKB @ YouTube ClinPGx @ Bluesky PharmGKB @ LinkedIn ClinPGx Blog

PharmGKB^® is a registered trademark of HHS and is financially supported by NIH/NHGRI/NICHD/NIDA/NCI. It is managed at Stanford University (U24 HG010615). ©2001-2025 PharmGKB.

PharmGKB^® data are subject to the Creative Commons Attribution-ShareAlike 4.0 license. PharmGKB data usage policy