Terms and Synonyms Searched:
| Terms | Search Results* | Entire Database** |
|---|---|---|
| Synonyms | ||
| VARDENAFIL | 26 studies | 87 studies |
| levitra | 20 studies | 67 studies |
| Staxyn | 2 studies | 3 studies |
| IIEF | 26 studies | 773 studies |
| Placebo | 26 studies | 71,730 studies |
| placebo-controlled | 12 studies | 29,545 studies |
| sham treatment | 1 studies | 546 studies |
| fake drug | -- | 2 studies |
| sham therapy | -- | 171 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 |