| # | Side effect | Count |
|---|---|---|
| 0 | FATIGUE | 18185 |
| 1 | MULTIPLE SCLEROSIS RELAPSE | 15085 |
| 2 | HEADACHE | 9201 |
| 3 | GAIT DISTURBANCE | 9025 |
| 4 | MULTIPLE SCLEROSIS | 8346 |
| 5 | ASTHENIA | 7542 |
| 6 | FALL | 7521 |
| 7 | MEMORY IMPAIRMENT | 7444 |
| 8 | MALAISE | 6842 |
| 9 | DRUG INEFFECTIVE | 6533 |
| # | Side effect | Count | Frequency |
|---|---|---|---|
| 0 | DRUG DELIVERY DEVICE IMPLANTATION | 121 | 0.5500 |
| 1 | INFUSION SITE HAEMATOMA | 137 | 0.4448 |
| 2 | JC VIRUS TEST POSITIVE | 372 | 0.4397 |
| 3 | NEUTRALISING ANTIBODIES POSITIVE | 112 | 0.3758 |
| 4 | GENERAL SYMPTOM | 2182 | 0.3539 |
| 5 | AGRAPHIA | 184 | 0.3518 |
| 6 | POOR VENOUS ACCESS | 1910 | 0.3372 |
| 7 | OPPORTUNISTIC INFECTION | 442 | 0.3084 |
| 8 | LOSS OF CONTROL OF LEGS | 1011 | 0.3069 |
| 9 | PROGRESSIVE MULTIFOCAL LEUKOENCEPHALOPATHY | 1908 | 0.3045 |