Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

My NCBI Filters
Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1989 1
1990 2
1991 1
1995 1
1997 1
2002 1
2003 2
2004 6
2005 6
2006 1
2007 2
2008 1
2023 0
Text availability
Article attribute
Article type
Publication date

Search Results

24 results
Results by year
Filters applied: . Clear all
Page 1
Role of CYP2B6 in stereoselective human methadone metabolism.
Totah RA, Sheffels P, Roberts T, Whittington D, Thummel K, Kharasch ED. Totah RA, et al. Among authors: sheffels p. Anesthesiology. 2008 Mar;108(3):363-74. doi: 10.1097/ALN.0b013e3181642938. Anesthesiology. 2008. PMID: 18292673 Free article.
Metabolism of alfentanil by cytochrome p4503a (cyp3a) enzymes.
Klees TM, Sheffels P, Dale O, Kharasch ED. Klees TM, et al. Among authors: sheffels p. Drug Metab Dispos. 2005 Mar;33(3):303-11. doi: 10.1124/dmd.104.002709. Epub 2004 Nov 22. Drug Metab Dispos. 2005. PMID: 15557344
Bioavailabilities of rectal and oral methadone in healthy subjects.
Dale O, Sheffels P, Kharasch ED. Dale O, et al. Among authors: sheffels p. Br J Clin Pharmacol. 2004 Aug;58(2):156-62. doi: 10.1111/j.1365-2125.2004.02116.x. Br J Clin Pharmacol. 2004. PMID: 15255797 Free PMC article. Clinical Trial.
24 results