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
Short courses of four to twelve weeks.
Who it's actually for
People with stress-related fatigue rather than a medical cause of tiredness.
Safe upper limit
UnverifiedNo formal limit; 200–600 mg extract daily in trials
Can be activating enough to disrupt sleep or trigger agitation.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.
Interactions to know about
- Antidepressants — SSRIs, SNRIs, MAOIs, tricyclics
- Blood pressure medication — Beta blockers, calcium channel blockers, ACE inhibitors
- Diabetes medication — Metformin, insulin, gliclazide, SGLT2 inhibitors
Other supplements:
Run your full list through the interaction check.
Practical notes
- Take before noon.
- Can trigger mania in bipolar disorder — avoid without psychiatric advice.