Selecting this operator means that the term must appear somewhere in the formulation result.
Using the Required operator with two
or more terms acts as the Boolean "and"; for example,
the below query equates to "Rilpivirine" AND "Dolutegravir":
After submitting the query, the Required operator converts to a "+" sign in the search bar and search history.
Selecting this operator means that the term must not appear in the formulation result.
Using the Excluded operator acts as the Boolean "not"; for example, the below query equates to "Rilpivirine" NOT "Dolutegravir":
After submitting the query, the Excluded operator converts to a "-" sign in the search bar and search history.
Selecting this operator means that the term does not have to appear in the formulation result to be considered a match.
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