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Side effects of IFN
| Symptom | No | % |
| Flu-like syndrome | 50 | 100 |
| Reddening at site of injection | 50 | 100 |
| Leucopenia | 20 | 40 |
| Alopecia | 12 | 24 |
| Itching | 10 | 20 |
| Fibromyalgia | 5 | 10 |
| Depression | 4 | 8 |
| Worsening of psoriasis | 2 | 4 |
| Thyroiditis | 2 | 4 |
| Worsening of seizures | 1 | 2 |
| Autoantibodies | ||
| ANA | 8 (1 dsDNA) | 16 |
| Thyroid | 3 | 6 |
Flu-like syndrome is fatigue, headache, arthralgia, fever.
ANA = antinuclear antibodies.
