Daily doses of antiepileptic drugs during the first trimester or trimester preceding abortion (mg/day)
| Active substance | Mean | SD | Median | First quartile | Third quartile | n |
| Phenobarbital | 97.2 | 43.4 | 94.4 | 66.7 | 133.3 | 44 |
| Clonazepam | 1.1 | 1.4 | 0.6 | 0.3 | 1.4 | 85 |
| Carbamazepine | 540.6 | 370.2 | 444.4 | 266.7 | 800.0 | 120 |
| Oxcarbazepine | 639.8 | 443.3 | 500.0 | 333.3 | 666.7 | 31 |
| Valproate | 508.8 | 385.4 | 366.7 | 200.0 | 666.7 | 116 |
| Valpromide | 800.0 | 565.7 | 800.0 | 400.0 | 1200 | 2 |
| Lamotrigine | 214.1 | 222.3 | 124.5 | 62.2 | 248.9 | 99 |
| Topiramate | 136.7 | 188.1 | 66.7 | 33.3 | 133.3 | 30 |
| Levetiracetam | 1556 | 1026 | 1333 | 1000 | 2000 | 33 |
| Zonisamide | 118.6 | 68.8 | 132.2 | 73.9 | 163.3 | 4 |