St. John’s Wort & Your Medications: The Full Breakdown
St. John's Wort is one of the 14 ingredients in Sleepem's 905mg proprietary blend, and it carries one of the most significant drug-interaction profiles of any common botanical.
If you take any prescription medication, this is the single most important thing to read on this entire website before you order.
What St. John's Wort does, mechanically
St. John's Wort (Hypericum perforatum) is a well-documented inducer of cytochrome P450 enzymes, a family of liver enzymes responsible for metabolizing a huge range of prescription drugs. When St. John's Wort induces these enzymes, it can speed up how quickly your body clears certain medications, reducing their plasma concentration and effectiveness. Background is available from NIH's National Center for Complementary and Integrative Health.
The medications this can affect
Per NCCIH-cited research, known interaction categories include:
Antidepressants (SSRIs, SNRIs, MAOIs) — with a potential serotonin syndrome risk when combined.
Hormonal contraceptives — reduced effectiveness.
Anticoagulants including warfarin.
Cyclosporine — used in organ transplant patients.
Statins.
HIV antiretrovirals.
Certain cancer medications.
Heart medications including digoxin.
This is not an exhaustive list.
Why this matters even in a 'natural' sleep product
It's easy to assume a botanical ingredient is automatically gentler or safer than a pharmaceutical one. St. John's Wort is a clear counterexample: it is a genuinely potent modulator of drug metabolism, traditional and widely available notwithstanding.
Applying this to Sleepem
St. John's Wort is one of 17 named ingredients in Sleepem's formula, included at an undisclosed amount within the 905mg proprietary blend. See our full 90-day review for how this weighs against the formula overall.
