Answer
Oestrogen-containing hormonal contraceptives may decrease valproic acid efficacy; prescribers should monitor clinical response, particularly seizure control, when these contraceptives are started or stopped.
Sources for this answer
- Convulex 150 mg CapsulesG.L Pharma UK Limited · emc · SmPC §4.4 Special warnings and precautions for use · Version 7Document updated
Sources checked