Is Vitamin B6 (Pyridoxal-5-Phosphate) Safe with Ethinyl estradiol?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Supplement with the active form Pyridoxal-5-Phosphate (P5P) at 25–50 mg daily if mood changes, depression, or PMS-like symptoms develop during OC use. Consult a healthcare provider before exceeding 100 mg/day long-term.
Why this interaction occurs
Ethinyl estradiol directly upregulates hepatic tryptophan oxygenase, dramatically increasing B6 consumption through kynurenine pathway activity. This functional B6 depletion reduces synthesis of serotonin and GABA, contributing to OC-associated depression, anxiety, and PMS. The active P5P form bypasses hepatic conversion steps that may also be impaired.
Evidence
Evidence level: strong.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 240,329 reports mentioning Ethinyl estradiol. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Ethinyl estradiol + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Vitamin B6 (Pyridoxal-5-Phosphate) interactions → · All Ethinyl estradiol interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.