Published reports of drug interactions resulting in pregnancy with the etonogestrel implant
| Enzyme inducer group | Drug | Spontaneous reporting | Case reports |
| ‘Herbal’ | St John’s wort | Simon et al 15 | |
| Antituberculous | Rifampicin | Simon et al 15 | Bacon and Mina36
Patni et al 37 Gbolade38 |
| Antiepileptic | Phenobarbitone | Bensouda-Grimaldi et al
14
Simon et al 15 | |
| Phenytoin | Simon et al 15 | ||
| Carbamazepine | Harrison-Woolrych and Hill13
Bensouda-Grimaldi et al 14 Simon et al 15 | Schindbek et al
39
Lange et al 40 | |
| Oxcarbazepine | Simon et al 15 | ||
| Antiretroviral | Efavirenz | Simon et al 15 | Matiluko et al
41
Lakhi and Govind42 McCarty et al 43 Leticee et al 44 |
| Nelfinavir | Simon et al 15 |