Table 3.
All adverse effects, sorted by frequency.
| Specific adverse effects observed | Frequency | Proportion |
|---|---|---|
| Headache | 8 | 16% |
| Irritability | 7 | 14% |
| Itching | 5 | 10% |
| Facial discomfort | 5 | 10% |
| Sleepy | 3 | 6% |
| Improved mood | 3 | 6% |
| Pain at application site | 2 | 4% |
| Headedness/dizziness | 2 | 4% |
| Trouble concentrating | 2 | 4% |
| Fatigue | 2 | 4% |
| Stiff neck | 2 | 4% |
| Mild scalp irritation | 1 | 2% |
| Neck pain | 1 | 2% |
| Nausea | 1 | 2% |
| More emotional | 1 | 2% |
| Transient muscle spasms | 1 | 2% |
| Seizure due to a programming error | 1 | 2% |
| Subtle disorientation | 1 | 2% |
| Improved concentration | 1 | 2% |
| Other | 1 | 2% |
| In total | 50 | 100% |