Check before you startThis one has documented interactions with medication classes where the consequences are serious. If you take any prescription medicine, run it past a pharmacist before starting.
How long to take it
Courses of a few weeks with breaks; continuous use is not well studied.
Who it's actually for
Short-term fatigue and cognitive support.
Safe upper limit
UnverifiedNo formal limit; courses of 200–400 mg extract are typical
Can raise blood pressure, cause insomnia, and interact with several drug classes.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.
Interactions to know about
- Blood thinners / antiplatelets — Warfarin, apixaban, rivaroxaban, clopidogrel, aspirin
- Diabetes medication — Metformin, insulin, gliclazide, SGLT2 inhibitors
- Blood pressure medication — Beta blockers, calcium channel blockers, ACE inhibitors
- Antidepressants — SSRIs, SNRIs, MAOIs, tricyclics
- Immunosuppressants — Ciclosporin, tacrolimus, azathioprine, biologics, steroids
Other supplements:
Run your full list through the interaction check.
Practical notes
- Take in the morning.
- Avoid with uncontrolled high blood pressure.