Answer
Rifampicin induces CYP3A4 and may reduce tamoxifen citrate levels, so co-administration requires care; the clinical relevance of this reduction is unknown.
Sources for this answer
- Tamoxifen Rosemont 10mg/5ml Oral SolutionRosemont Pharmaceuticals Limited · emc · SmPC §4.5 Interaction with other medicinal products · Version 17Document updated
Sources checked