Terms and Synonyms Searched:
| Terms | Search Results* | Entire Database** |
|---|---|---|
| Synonyms | ||
| opioid use | 811 studies | 2,179 studies |
| narcotics use | 7 studies | 265 studies |
| substance | 811 studies | 18,310 studies |
| -- | No studies found |
| * | Number of studies in the search results containing the term or synonym |
| ** | Number of studies in the entire database containing the term or synonym |