Frequency of six different issues reported concerning the quality of the medicines tested
| Stated problem | Frequency of studies containing samples with stated problem | Per cent |
|---|---|---|
| Inadequate amount of active ingredient | 14 | 93 |
| No active ingredient | 7 | 47 |
| Excessive amount of active ingredient | 6 | 40 |
| Dissolution failure | 5 | 33 |
| Wrong ingredient | 4 | 27 |
| Impurity | 2 | 13 |