Choose Your Options
Use only the search options that you need--leave the others blank.
Note: Search results are automatically restricted to records with abstracts except in SciSearch.
Words in Title
Enter words that must appear in the title. For different word endings, use the ? wildcard. Example: REDUC? searches for reduce, reduces, reducing, reduction, etc. Combine words to get specific information. Example: CHOLESTEROL AND (REDUC? OR LOW?)
Main Subject
Use this option to search words that need to appear in the title or subject keywords. You can use wildcards and combine words, as described above.
CAS Registry Number
Enter the CAS Registry Number for a substance, including all hyphens. You can enter more than one number, for example: 7784-13-6 OR 7784-18-1. To locate the CAS Registry Number for a drug name, use the Chemical Substances Directory search. (Note: CAS Registry Numbers are not available in PASCAL or SciSearch.)
Subject Population
Search results can be limited to records dealing with human subject populations only. (Note: results from PASCAL and SciSearch will not be restricted by selecting this option.)
To search MEDLINE for articles by a specific author or by all authors at an organization, use the