Clinical trial · Interventional
REDucing Hot FLASHes in Women Using Endocrine Therapy.
A Randomized Intrapatient Cross-over Study to Assess the Efficacy of Oxybutynin Versus Venlafaxine in Reducing Hot Flashes in Women Using Endocrine Therapy After Breast Cancer.
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
The goal of this randomized intrapatient cross-over study is to assess the efficacy of oxybutynin versus venlafaxine in reducing hot flashes in women using endocrine therapy after breast cancer. The objectives it aims to answer are: * To assess the efficacy of oxybutynin versus venlafaxine in reducing hot flashes in women using endocrine therapy after breast cancer * To assess side effects of oxybutynin versus venlafaxine. * To assess the personal preference of women for oxybutynin versus venlafaxine in reducing hot flashes. * To assess quality of life of women when reducing hot flashes in women using endocrine therapy after breast cancer. Participants will fill-out a patient diary during 15 weeks total on a daily basis and receive an (online) questionnaire three times total. Researchers will compare two groups (venlafaxine group versus oxubutynine group) to assess its efficacy concerning hot flashes.
Conditions
Conditions (2)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Breast Cancer | Malignant Breast Neoplasm | CURATED_EXACT | 0.92 |
| Hot Flash Due to Medication | — | UNRESOLVED | — |
Interventions
Interventions (2)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Oxybutynin | Drug | — | UNRESOLVED |
| Venlafaxine | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (2)
- type
- EXPERIMENTAL
- label
- Venlafaxine
- description
- In this open-label randomized controlled intrapatient cross-over study patients are randomly assigned to one of the two treatment groups. After a one week baseline period, group 1 starts with venlafaxine 37.5 mg once daily for 7 days followed by 75 mg once daily for 5 weeks followed by a two-week wash-out period (no medication), hereafter the group starts with oxybutynin 5 mg twice per day for 6 weeks total.
- interventionNames
- Drug: Oxybutynin
- Drug: Venlafaxine
- type
- EXPERIMENTAL
- label
- Oxybutynin
- description
- After a one week baseline period, group 2 starts with oxybutynin 5 mg twice per day for 6 weeks total followed by a two-week wash-out period (no medication), hereafter the group starts with venlafaxine 37.5 mg once daily for 7 days followed by 75mg once daily for 5 weeks.
- interventionNames
- Drug: Oxybutynin
- Drug: Venlafaxine
Primary outcomes (1)
Eligibility
Eligibility (as posted)
- Sex
- Female
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * Pre-, peri- or postmenopausal women of 18 years or above; * Indication for endocrine therapy and already started with tamoxifen, aromatase inhibitors or luteinizing hormone-releasing hormone analogues for at least 4 weeks and planning to continue for the duration of the study; * Experiencing hot flashes with a minimum of 14 per week for at least 1 month and desire to start a pharmacologic intervention. Exclusion Criteria: * Pregnant; * Breast feeding; * Patients who receive chemotherapy or immunotherapy/HER2 antibodies within the prior 8 weeks, and patients scheduled for chemotherapy during the study period; * Palliative setting; * Use of venlafaxine or any other antidepressants, also including St. John's wort within the previous year; * Creatinine clearance \< 30 ml/min; * Liver cirrhosis; * Use of gabapentin and/or calcium channel antagonists within 2 weeks of study entry; * Use of oxybutynin before study entry; * Use of any other substances or therapies for the treatment of hot flashes, for instance acupuncture.
References
Publications (0)
Data not yet available