# Effect of Anti-epileptic Drugs on Etonogestrel-releasing Implant Pharmacokinetics in Women With Epilepsy

> **NCT03307863** · PHASE4 · SUSPENDED · sponsor: **University of Sao Paulo** · enrollment: 69 (estimated)

## Conditions studied

- Contraception
- Drug Interactions

## Interventions

- **DRUG:** Carbamazepine-Implant
- **DRUG:** Topiramate-Implant
- **DRUG:** Implant

## Key facts

- **NCT ID:** NCT03307863
- **Lead sponsor:** University of Sao Paulo
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** SUSPENDED
- **Start date:** 2017-11-01
- **Primary completion:** 2027-11-30
- **Final completion:** 2028-11-30
- **Target enrollment:** 69 (ESTIMATED)
- **Why stopped:** We suspended the study for budget issues. It might be resumed in the future.
- **Last updated:** 2025-01-28


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03307863

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03307863, "Effect of Anti-epileptic Drugs on Etonogestrel-releasing Implant Pharmacokinetics in Women With Epilepsy". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT03307863. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*